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Digital Signature - Asymmetric Key , Why used for Authentication & Non Repudiation (Hindi)
 
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Digital Signature - Asymmetric Key Cryptography, Why used for Authentication and Non Repudiation (Hindi) Keywords: Digital Signature Asymmetric Encryption Authentication Non Repudiation
Non-Repudiation - CompTIA Security+ SY0-401: 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq See my entire index of CompTIA Security+ videos at http://www.FreeSecurityPlus.com - - - - - Our encryption technologies not only provide a secure channel of communication, but they can also prove that the data we’re receiving has not been changed between endpoints. In this video, you’ll learn about non-repudiation and how digital signatures can ensure the integrity and authenticity of our data. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 27100 Professor Messer
Symmetric vs Asymmetric ( public key )  Cryptography
 
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symmetric vs asymmetric ( public key ) cryptography symmetric key vs assymetric key encryption advantages of symmetric key cryptography advantages of assymetric cryptography concept of digital signatures safe and secure communication between systems encrypted communication between systems like us on facebook : https://www.facebook.com/guidetohacking/
Views: 35792 Hacks And Security
Nonrepudiation — No denying it!!
 
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Preventing forgery, or fictitious claims of forgery, is an important task when securing TCP/IP communications. This is usually referred to as non-repudiation. Non-repudiation deals with the integrity of the data and the legitimacy of the sender. More at: http://haimit.com/nonrepudation PLAYLIST: Security/Malware/Attacks https://www.youtube.com/playlist?list=PLXp4credUt6QjvITFH5E0vqzwEZYp-KjZ SUBSCRIBE TO THE CHANNEL: http://www.youtube.com/c/HaimitRyanToolsie WEBSITE: www.HaimIT.com FOLLOW: Google plus: https://plus.google.com/+HaimitRyanToolsie/posts Twitter: https://twitter.com/haim_it
What is NONREPUDIATION? What does NONREPUDIATION mean? NONREPUDIATION meaning & explanation
 
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What is NONREPUDIATION? What does NONREPUDIATION mean? NONREPUDIATION meaning - NONREPUDIATION pronunciation - NONREPUDIATION definition - NONREPUDIATION explanation - How to pronounce NONREPUDIATION? Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. SUBSCRIBE to our Google Earth flights channel - https://www.youtube.com/channel/UC6UuCPh7GrXznZi0Hz2YQnQ Non-repudiation refers to a state of affairs where the author of a statement will not be able to successfully challenge the authorship of the statement or validity of an associated contract. The term is often seen in a legal setting wherein the authenticity of a signature is being challenged. In such an instance, the authenticity is being "repudiated". In a general sense non-repudiation involves associating actions or changes to a unique individual. For a secure area, for example, it may be desirable to implement a key card access system. Non-repudiation would be violated if it were not also a strictly enforced policy to prohibit sharing of the key cards and to immediately report lost or stolen cards. Otherwise determining who performed the action of opening the door cannot be trivially determined. Similarly, for computer accounts, the individual owner of the account must not allow others to use that account, especially, for instance, by giving away their account's password, and a policy should be implemented to enforce this. This prevents the owner of the account from denying actions performed by the account. Regarding digital security, the cryptological meaning and application of non-repudiation shifts to mean: A service that provides proof of the integrity and origin of data. An authentication that can be asserted to be genuine with high assurance. Proof of data integrity is typically the easiest of these requirements to accomplish. A data hash, such as SHA2, is usually sufficient to establish that the likelihood of data being undetectably changed is extremely low. Even with this safeguard, it is still possible to tamper with data in transit, either through a man-in-the-middle attack or phishing. Due to this flaw, data integrity is best asserted when the recipient already possesses the necessary verification information. The most common method of asserting the digital origin of data is through digital certificates, a form of public key infrastructure to which digital signatures belong. Note that the public key scheme is not used for encryption in this form; i.e. the goal is not to achieve confidentiality, since a message signed with a private key can be read by anyone using the public key. Verifying the digital origin means that the certified/signed data can be, with reasonable certainty, trusted to be from somebody who possesses the private key corresponding to the signing certificate. If the key is not properly safeguarded by the original owner, digital forgery can become a major concern. The ways in which a party may attempt to repudiate a signature present a challenge to the trustworthiness of the signatures themselves. The standard approach to mitigating these risks is to involve a trusted third party. The two most common TTPs are forensic analysts and notaries. A forensic analyst specializing in handwriting can look at a signature, compare it to a known valid signature, and make a reasonable assessment of the legitimacy of the first signature. A notary provides a witness whose job is to verify the identity of an individual by checking other credentials and affixing their certification that the party signing is who they claim to be. Further, a notary provides the extra benefit of maintaining independent logs of their transactions, complete with the type of credential checked and another signature that can independently be verified by the preceding forensic analyst. For this double security, notaries are the preferred form of verification. On the digital side, the only TTP is the repository for public key certificates. This provides the recipient with the ability to verify the origin of an item even if no direct exchange of the public information has ever been made. The digital signature, however, is forensically identical in both legitimate and forged uses - if someone possesses the private key they can create a "real" signature. The protection of the private key is the idea behind the United States Department of Defense's Common Access Card (CAC), which never allows the key to leave the card and therefore necessitates the possession of the card in addition to the personal identification number (PIN) code necessary to unlock the card for permission to use it for encryption and digital signatures.
Views: 1720 The Audiopedia
Non-repudiation - CompTIA Security+ SY0-301: 6.1
 
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See our entire index of CompTIA Security+ videos at http://www.FreeSecurityPlus.com - One of the powerful features of modern cryptography is the ability to digitally "sign" your files and documents. In this video, you'll learn how non-repudiation can be used to ensure the authenticity and integrity of your documents.
Views: 16266 Professor Messer
Chapter 4, part 8, Information Security: Principles and Practice
 
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Information Security: Principles and Practice, 2nd edition, by Mark Stamp Chapter 4: Public Key Crypto Section 4.7, non-repudiation
Views: 3092 Mark Stamp
Symmetric vs. Asymmetric Encryption - CompTIA Security+ SY0-401: 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Our encryption methods will generally use either symmetric encryption or asymmetric encryption, and sometimes both! In this video, you’ll learn the advantages and disadvantages when using symmetric or asymmetric encryption types. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 59487 Professor Messer
Public Keys and Private Keys - CompTIA Security+ SY0-401: 6.1
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Asymmetric encryption uses two different keys to provide a secure channel. In this video, you’ll learn how public keys and private keys can be used to encrypt data, create digital signatures, and create a secure symmetric key. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 40192 Professor Messer
Nonrepudiation Meaning
 
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Video shows what nonrepudiation means. Assurance that a contract cannot later be denied by either of the parties involved.. Assurance that the claimed sender or recipient is in fact the party who sent or received a given message.. Nonrepudiation Meaning. How to pronounce, definition audio dictionary. How to say nonrepudiation. Powered by MaryTTS, Wiktionary
Views: 499 ADictionary
CISA Exam-Testing Concept-Asymmetric Encryption (Domain-5)
 
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Point to remember for CISA exam: (1)In any given scenario, when objective is to ensure ‘confidentiality’, message has to be encrypted using receiver’s public key. (2)In any given scenario, when objective is to ensure ‘authentication’, HASH of the message has to be created and HASH to be encrypted using sender’s private key. Please note that hash is also known as message digest. (3)In any given scenario, when objective is to ensure ‘integrity’, HASH of the message has to be created and HASH to be encrypted using sender’s private key. Please note that hash is also known as message digest. (4)In any given scenario, when objective is to ensure ‘confidentiality & authentication’, following treatment is required: -Hash of the message to be encrypted using sender’s private key (to ensure authentication/non-repudiation) -Message to be encrypted using receiver’s public key (to ensure confidentiality) (5)In any given scenario, when objective is to ensure ‘confidentiality & authentication & integrity’, following treatment is required: -Message to be encrypted using receiver’s public key (to ensure confidentiality) -Hash of the message to be encrypted using sender’s private key (to ensure authentication/non-repudiation and integrity)
Views: 7172 Hemang Doshi
Cryptography -  The ElGamal Public key System (Public key encryption from Diffie Hellman)
 
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The ElGamal Public key System To get certificate subscribe: https://www.coursera.org/learn/crypto ======================== Playlist URL: https://www.youtube.com/playlist?list=PL2jykFOD1AWYosqucluZghEVjUkopdD1e ======================== About this course: Cryptography is an indispensable tool for protecting information in computer systems. In this course you will learn the inner workings of cryptographic systems and how to correctly use them in real-world applications. The course begins with a detailed discussion of how two parties who have a shared secret key can communicate securely when a powerful adversary eavesdrops and tampers with traffic. We will examine many deployed protocols and analyze mistakes in existing systems. The second half of the course discusses public-key techniques that let two parties generate a shared secret key.
Views: 494 intrigano
How Do Digital Signatures Work?
 
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In this video, I will be showing you how digital signatures are generated and how they help in establishing non-repudiation.
Views: 169896 Fasih Khatib
Digital Signatures
 
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This video is part of the Udacity course "Intro to Information Security". Watch the full course at https://www.udacity.com/course/ud459
Views: 37686 Udacity
What is Encryption? Public Key Encryption? Explained in Detail
 
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Namaskaar Dosto, is video mein maine aapko encryption ke baare mein bataya hai, aap sabhi ne computer aur internet use karte time Encryption aur decryption ke baare mein jarur suna hoga, usme aapko SSL encrytpion TSL Encryption, Public Key encryption, private key encryption wagereh ke baare mein bhi suna hoga, aur abhi recently whatsapp ne bhi end to end encryption launch kiya hai, toh aise mein hamare man mein bahut se sawaal hai ki aakhir yeh encryption hota kya hai? Encryption hum hamari email pe bhi use karte hai, aur hum online banking karte time bhi encryption ka use karte hai. Mujhe umeed hai ki yeh video dekhne ke baad aap encryption aur decryption ke baare mein sab kuch jaan jayenge, aur saath hi saath public key encryption ke baare mein bhi samajh jayenge. aur aap aaraam se whatsapp ke encryption feature ko bhi use kar payenge. Win Galaxy S7, S7 Edge Here: http://bit.ly/TheMegaGiveaway Share, Support, Subscribe!!! Subscribe: http://bit.ly/1Wfsvt4 Youtube: http://www.youtube.com/c/TechnicalGuruji Twitter: http://www.twitter.com/technicalguruji Facebook: http://www.facebook.com/technicalguruji Instagram: http://instagram.com/technicalguruji Google Plus: https://plus.google.com/+TechnicalGuruji About : Technical Guruji is a YouTube Channel, where you will find technological videos in Hindi, New Video is Posted Everyday :)
Views: 151235 Technical Guruji
Secure communication with symmetric and asymmetric encryption
 
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Follow our channel at http://vid.io/xomJ Visit our web page at http://vid.io/xomQ In this video I describe how Bob can send a secret message to Alice without Eve getting its content. With asymmetric keys, symmetric encryption and signing they achieve message confidentiality, message integrity, non-repudiation and secure distribution of encryption keys.
Views: 613 nat0.net
What Is Non Repudiation?
 
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However, that is not correct the non repudiation service can be viewed as an extension to identification and authentication. Non repudiation wikipedia. Non repudiation is a legal concept that 20 oct 2016 this article sheds light on the two approaches to achieve non of an electronic message emission and assurance someone cannot deny validity something (nr) one security services (or dimensions as defined in document x. 805 by the itu) for point to point communications. What is non repudiation? Definition and meaning why banks need repudiation of origin really repudiable with digital signatures? . What is nonrepudiation? Definition from techopedia. What is the difference between authenticity and non repudiation? What repudiation? Principles, techniques best practices. Secure 19 dec 2016 a definition of non repudiation with several common examples service provides assurance the origin or delivery data in order to protect sender against false denial by recipient that has public key technology is traditionally defined as inability person (to whom been bound recognized certification definition, act repudiatingNon wikipedia. What is non repudiation in network security? Non slovnk potaov informatiky a st. Non repudiation is a much desired property in the digital world. What is nonrepudiation? Webopedia definition. Non repudiation wikipedia non refers to a state of affairs where the author statement will not be able successfully challenge authorship or validity in general, nonrepudiation is ability ensure that party contract communication cannot deny authenticity their signature on document means transferred message has been sent and received by parties claiming have along with digital signatures, public keys can problem when it comes if recipient exposed, either knowingly 31 aug 2011 some people taught provided through crypto mathematics alone. In this lesson, you'll learn more non repudiation nepopiratelnost. This article describes that property and shows how it can be definition of non repudiation general intent to accept one's obligation under a contract bound for its performance 29 aug 2016 understanding achieve emission origin in banking transactions 14 jun 2017 what does mean? Repudiation means reject or deny the validity something. Non repudiation and digital signature infosec resources. Vlastnost, kter umon pozdj dkaz o manipulaci s daty vetn jejich doruen, pvodu, pedn apod 9 jan 2014 introduction. Rant about non repudiation the world stddefine at dictionary. Understanding non repudiation of origin and what is repudiation? Cryptomathicnetwork, information computer security lab 5 examples simplicable. In general, non repudiation applies when data is 27 feb 2017 a typ
Views: 75 Hadassah Hartman
Non-repudiation: Ability to leverage digital signature as a service
 
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This is a session given by Henrik Eriksson at Nordic APIs 2016 Platform Summit on October 25th, in Stockholm Sweden.
Views: 214 Nordic APIs
Public Key Infrastructure
 
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Public Key Infrastructure (PKI) provides a safe and reliable environment for electronic transactions in the Internet. It is a security framework that uses public key encryption technique to protect the confidentiality, integrity, authenticity and non-repudiation of data. www.infosec.gov.hk
Views: 2419 GovHKvideochannel
Why digital certificate?
 
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Digital Signature: https://www.youtube.com/watch?v=TmA2QWSLSPg&t=2s Digital signature is used for authentication, non-repudiation and data integrity, but there is one weakness of digital signature alone: man-in-the-middle attack. Digital certificates are electronic credentials issued by a trusted third party. A digital certificate not only verifies the identity of the owner, but also verifies that the owner owns the public key. In this video, I will demonstrate why digital signature has weakness and how digital certificate comes in place to make sure digitally signed document must come originally from the claimed sender. Advanced Cryptography: https://www.youtube.com/watch?v=TmA2QWSLSPg&list=PLSNNzog5eydtwsdT__t5WtRgvpfMzpTc7 Playlist: Basic Cryptography https://www.youtube.com/watch?v=vk3py9M2IfE&list=PLSNNzog5eyduN6o4e6AKFHekbH5-37BdV Please leave comments, questions and please subscribe! Sunny Classroom
Views: 15178 Sunny Classroom
Secure communication with symmetric and asymmetric encryption
 
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In this video I explain how secure communication with symmetric encryption can be even more secured with asymmetric encryption, and signatures for non-repudiation of origin and delivery.
Views: 86 Jimmy Larsson
What Is Non Repudiation?
 
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A token or fingerprint 14 jun 2017 what does non repudiation mean? Repudiation means to reject deny the validity of something. What is nonrepudiation? Definition from whatis searchsecurity. Typically, nonrepudiation refers to the ability ensure that a party contract or communication cannot deny authenticity of their signature on document sending message they originated non repudiation state affairs where author statement will not be able successfully challenge authorship validity is way guarantee sender later having sent and recipient received along with digital signatures, public keys can problem when it comes if has exposed, either knowingly prove an operation event taken place, so this repudiated. What is nonrepudiation? Definition from techopedia. What is non repudiation? Definition and meaning what authentication, integrity repudiation in the field of simplicable. In this lesson, you'll learn more 31 aug 2011 i'm new to infosec and doing some reading. Non repudiation is a much desired property in the digital world. For e mails, for example, non repudiation in network security is the ability to prevent a denial an electronic message or transaction. Not surprisingly one starting point was wikipedia. What is non repudiation? Principles, techniques and best practices. Non repudiation of emission (nre) makes a link between the sender message and content. Non repudiation (information security) what is non in network security? What the difference between authenticity and repudiation? . What is nonrepudiation? Definition from whatis searchsecuritywhat Webopedia definition. Nonrepudiation is the assurance that someone cannot deny something. Non repudiation is a legal concept that 9 jan 2014 introduction. Why banks need non repudiation of origin and is really repudiable with digital signatures? . Techtarget definition nonrepudiation url? Q webcache. 26 aug 2013 definition of non repudiation in a signed email non repudiation is a feature of a digital signature which allows the author, or 'signer', of a. Non repudiation and digital signature infosec resources. Non repudiation in a signed email defi globalsign support portal. In information security, authentication allows to determine whether a person is really who it claims be 19 dec 2016 definition of non repudiation with several common examples service provides assurance the origin or delivery data in order protect sender against false denial by recipient that has 29 aug (nro) makes link between message and. Googleusercontent search. Non repudiation in the digital environment definition of non youtube. Adding a second factor authentication (e. In this article, authenticity and non repudiation definition of general intent to accept one's obligation under a contract be bound for its performance it's authentication, not. This article describes that property and shows how it can be 27 feb 2017 a typical aim of non repudiation is to ensure an individual or organization are unable deny they were the origina
Views: 215 Til Til
19.4 Cryptographic protocol
 
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Module19 – Cryptography, Section 19.4 – Cryptographic protocol. Cryptographic protocol applies cryptographic methods and describes how the algorithms should be used and some aspects are: – Key agreement or establishment – Entity authentication – Symmetric encryption and message authentication material construction – Secured application-level data transport – Non-repudiation methods – Secret sharing methods – Secure multi-party computation Crypto Protocols • Internet Key Exchange (IKE) • IPSec (Internet Protocol Security) • Kerberos • Off-the-Record Messaging (OTR) • Point to Point Protocol (PPP) • Signal Protocol • Transport Layer Security (TLS) • ZRTP (Z and Real-time Transport Protocol) TLS is a cryptographic protocol that is used to secure web (HTTP/HTTPS) connections. TLS is used in applications such as web browsing, email, Internet faxing, instant messaging, and voice-over-IP (VoIP). The 3 aspects of TLS are: • It has an entity authentication mechanism, based on the X.509 system. • A key setup phase, where a symmetric encryption key is formed by employing public-key cryptography. • An application-level data transport function. Cryptographic protocols can be verified formally to identify threats and done through below models: • Dolev–Yao model • Burrows–Abadi–Needham logic (BAN logic) • Protocol composition logic (PCL) • Strand space • Alice & Bob notation Projects and tools for Security protocol verification – AVISPA and AVANTSSAR – Casper / FDR compiler – CryptoVerif, ProVerif – Cryptographic Protocol Shapes Analyzer (CPSA) – Knowledge In Security protocolS (KISS) – Maude-NRL Protocol Analyzer (Maude-NPA) – Scyther – Tamarin Prover
Views: 350 CBTUniversity
RSA Algorithm with solved example using extended euclidean algorithm | CSS series #7
 
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Take the Full Course of Cryptography and Network Security What we Provide 1) 20 Videos (Index is given down) + More Update will be Coming Before final exams 2)Hand made Notes with problems for your to practice 3)Strategy to Score Good Marks in Cryptography and Network Scurity To buy the course click https://goo.gl/mpbaK3 if you have any query email us at [email protected] Sample Notes : https://goo.gl/Ze1FpX or Fill the form we will contact you https://goo.gl/forms/2SO5NAhqFnjOiWvi2 Cryptography and System Security Index Lecture 1 Introduction to Cryptography and Security System Lecture 2 Security Goals and Mechanism Lecture 3 Symmetric Cipher Lecture 4 Substitution Cipher Lecture 5 Transposition Cipher Lecture 6 Stream and Block Cipher Lecture 7 Mono Alphabetic Cipher Lecture 8 Poly Alphabetic Cipher Lecture 9 Diffie Hellman Lecture 10 RSA Algorithm with Solved Example Lecture 11 IDEA Algorithm Full Working Lecture 12 SHA-1 Algorithm Full Working Lecture 13 Blowfish Algorithm Full working Lecture 14 DES Algorithm Full Working Lecture 15 Confusion and Diffusion Lecture 16 AES Algorithm Full working Lecture 17 Kerberos Lecture 18 Malicious Software ( Virus and worms ) Lecture 19 DOS and DDOS Attack Lecture 20 Digital Signature Full working Explained More videos Coming Soon.
Views: 176344 Last moment tuitions
symmetric key cryptography
 
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https://8gwifi.org/CipherFunctions.jsp Cryptographic Algorithms generally fall into one of two different categories, or are a combination of both. Symmetric Fast Only provide confidentiality Examples: DES, AES, Blowfish, RC4, RC5 Asymmetric Large mathematical operations make it slower than symmetric algorithms No need for out of band key distribution (public keys are public!) Scales better since only a single key pair needed per individual Can provide authentication and nonrepudiation Examples: RSA, El Gamal, ECC, Diffie-Hellman problem with symmetric key cryptography DES (Data Encryption Standard) 64 bit key that is effectively 56 bits in strength Actual algorithm is called DEA (Data Encryption Algorithm) DES Modes Electronic Code Book Cipher Block Chaining (most commonly used for general purpose encryption) Cipher Feedback Output Feedback Counter Mode (used in IPSec) 3DES 112-bit effective key length Uses either 2 or 3 different smaller keys in one of several modes Modes EEE2/3 EDE2/3 AES NIST replaced DES in 1997 with this Uses the Rijndael algorithm Supports key/block sizes of 128, 192, and 256 bits Uses 10/12/14 rounds as block size increases IDEA (International Data Encryption Algorithm) Operates on 64 bit blocks in 8 rounds with 128 bit key Considered stronger than DES and is used in PGP Blowfish 64 bit block cipher with up to 448 bit key and 16 rounds Designed by Bruce Schneier RC4 Stream cipher with variable key size created by Ron Rivest RC5 Another Rivest cipher Block cipher with 32/64/128 bit blocks and keys up to 2048 bits RC6 Beefier version of RC5 submitted as AES candidate CAST 64 bit block cipher with keys between 40-128 bits with 12-16 rounds depending on key length CAST-256 used 128-bit blocks and keys from 128-256 bits using 48 rounds SAFER (Secure and Fast Encryption Routine) Set of patent-free algorithms in 64 and 128 bit block variants Variation used in Bluetooth Twofish Adapted version of Blowfish with 128 bit blocks, 128-256 bit keys and 16 rounds AES Finalist Kryptografie mit symmetrischem Schlüssel symmetric key cryptography symmetric key cryptography tutorial symmetric key cryptography example symmetric key cryptography vs asymmetric key cryptography symmetric and asymmetric key cryptography symmetric key cryptography Kryptografie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptographie mit symmetrischem Schlüssel Kryptografie mit symmetrischem Schlüssel und asymmetrische Schlüsselkryptographie symmetrische und asymmetrische Schlüsselkryptographie Kryptografie mit symmetrischem Schlüssel
Views: 36892 Zariga Tongy
NETWORK SECURITY - TYPES OF AUTHENTICATION (Message Encryption, MAC, Hash Functions)
 
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Three types of Authentications 1. Message Encryption 2. Message Authentication Code 3. Hash Functions.
Cryptography Android App
 
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✴ Cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages; various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, electrical engineering, communication science, and physics. Applications of cryptography include electronic commerce, chip-based payment cards, digital currencies, computer passwords, and military communications.✴ https://play.google.com/store/apps/details?id=in.softecks.cryptography ► This App is meant for students of computer science who aspire to learn the basics of cryptography. It will be useful for networking professionals as well who would like to incorporate various cryptographic algorithms to ensure secure data communication over their networks.✦ 【Topics Covered in this App are Listed Below】 ⇢ Origin of Cryptography ⇢ Modern Cryptography ⇢ Cryptosystems ⇢ Attacks On Cryptosystems ⇢ Traditional Ciphers ⇢ Modern Symmetric Key Encryption ⇢ Block Cipher ⇢ Feistel Block Cipher ⇢ Data Encryption Standard ⇢ Triple DES ⇢ Advanced Encryption Standard ⇢ Block Cipher Modes of Operation ⇢ Public Key Encryption ⇢ Data Integrity in Cryptography ⇢ Cryptography Hash functions ⇢ Message Authentication ⇢ Cryptography Digital signatures ⇢ Public Key Infrastructure ⇢ Cryptography Benefits & Drawbacks
Views: 49 10 Up's.!
[Hindi] What is Cryptography ? | Kya hai cryptography ? | Explained in simple words
 
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Hello Dosto Aaj hum baat karenge cryptography ke bare me ki ye kya hota hai aur iska itemaal kaise aur kaha hota hai. iska sambandh kisi bhi data ya message ko safely pohchane se hota hai aur uski security badhayi jati hai taaki bich me koi an-adhikarik tarike se usko access na kar paye. aasha karta hoo apko ye video pasand ayegi agar aapko ye video achhi lage to isse like kare aur apne dosto ke sath share kare aur abhi tak aapne mera channel subscribe nahi kia hai to jarur is channel ko subscribe kare. Subscribe to my channel for more videos like this and to support my efforts. Thanks and Love #TechnicalSagar LIKE | COMMENT | SHARE | SUBSCRIBE ---------------------------------------------------------------------------------- For all updates : SUBSCRIBE Us on Technical Sagar : www.youtube.com/technicalsagarindia LIKE us on Facebook https://www.facebook.com/technicalsagarindia Follow us on Twitter : http://www.twitter.com/iamasagar
Views: 70257 Technical Sagar
Asymmetric Cryptography Algorithms - CompTIA Security+ SY0-401: 6.2
 
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Security+ Training Course Index: http://professormesser.link/sy0401 Professor Messer’s Course Notes: http://professormesser.link/sy0401cn Frequently Asked Questions: http://professormesser.link/faq - - - - - Asymmetric cryptography has enabled secure communication, digital signatures, and much more. In this video, you’ll learn about the well-known asymmetric algorithms of RSA and Diffie-Hellman. - - - - - Download entire video course: http://professormesser.link/401adyt Get the course on MP3 audio: http://professormesser.link/401vdyt Subscribe to get the latest videos: http://professormesser.link/yt Calendar of live events: http://www.professormesser.com/calendar/ FOLLOW PROFESSOR MESSER: Professor Messer official website: http://www.professormesser.com/ Twitter: http://www.professormesser.com/twitter Facebook: http://www.professormesser.com/facebook Instagram: http://www.professormesser.com/instagram Google +: http://www.professormesser.com/googleplus
Views: 24795 Professor Messer
Difference between Asymmetric Key and Symmetric Key Cryptography
 
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Difference between Asymmetric Key and Symmetric Key Cryptography Keywords: Asymmetric Key Cryptography Symmetric Key Cryptography Network Security Notes
Applications of cryptosystems
 
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This whole video is briefly about the application of Public-key cryptography which provide each of the major security services: confidentiality, user authentication, data origin authentication, data integrity, and non-repudiation.
Views: 122 Jack Ming
Encryption Explained | Public Key Encryption In Hindi
 
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Hello Dosto!! Aaj ki is video mai hum data encryption eai phir encryption ke bare mai detail mai baat karne wale hai. Encryption mai sabse sada koi muskil topic hai toh oh hai public key encryption eai phir public key cryptography eai phir asymmetric key cryptography eai phir asymmetric key encryption eai phir public key cryptography ke bare mai. Jaise ki aap ko pata hai encryption 2 tarake hote hai ek hai public key encryption dusra hai private key encryption. Private key encryption ko symmetric key encryption eai phir symmetric cryptography bhi bola jata hai. Mainly encryption ka kam hai computer ke data transmission mai security provide karna. ------------------------------------------------------------ SSD http://amzn.to/2AUlS6f Processors http://amzn.to/2AU7X09 Graphics Card Graphics Cards http://amzn.to/2Dop4dq Ram http://amzn.to/2qXmCbn Internal Hard Drives http://amzn.to/2AV1HFf ---------------------------------------------------------- My electronics Channel :- https://www.youtube.com/channel/UCV7ovTvN06Dvdzfo4GB3dvA Arduino Control Led :- https://www.youtube.com/watch?v=TQX1hp3FLAo -------------------------------------------------------------------------------------- -------------------------------------------------------------------------------------- CHANNEL DESCRIPTION HELLO FRIENDS.THIS CHANNEL IS A TECHNOLOGY RELATED CHANNEL.A NEW VIDEO WILL COME EVERYDAY .I WILL PROVIDE YOU TECHNICAL KNOWLEDGE/REPAIRING TYPE VIDEO IN 5 DAYS,TWO DAYS I WILL PROVIDE YOU TUTORIALS.ONE DAY OF EVERY MONTH I WILL PROVIDE YOU A ELECTRONICS RELATED PROJECT.YOU CAN ASK ME EVERY QUESTION ON COMMENT SECTION & ALSO YOU CAN REQUEST ME TO MAKE A VIDEO ABOUT ANY THING.I WILL TRY TO MADE THIS. ----------------------------------------------------------------------------------------- Subscribe www.youtube.com/geekysoumya GOOGLE PLUS https://plus.google.com/u/0/106215010365082382930 FOLLOW ME ON TWITTER https://twitter.com/sdas47711 LIKE ME ON FACE BOOK https://www.facebook.com/Geekysoumya123/ add me on friends list on FB https://www.facebook.com/sd.das.334
Views: 460 GEEKY SOUMYA
What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean?
 
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What is PUBLIC-KEY CRYPTOGRAPHY? What does PUBLIC-KEY CRYPTOGRAPHY mean? PUBLIC-KEY CRYPTOGRAPHY meaning - PUBLIC-KEY CRYPTOGRAPHY definition - PUBLIC-KEY CRYPTOGRAPHY explanation. Source: Wikipedia.org article, adapted under https://creativecommons.org/licenses/by-sa/3.0/ license. Public-key cryptography, or asymmetric cryptography, is any cryptographic system that uses pairs of keys: public keys that may be disseminated widely paired with private keys which are known only to the owner. There are two functions that can be achieved: using a public key to authenticate that a message originated with a holder of the paired private key; or encrypting a message with a public key to ensure that only the holder of the paired private key can decrypt it. In a public-key encryption system, any person can encrypt a message using the public key of the receiver, but such a message can be decrypted only with the receiver's private key. For this to work it must be computationally easy for a user to generate a public and private key-pair to be used for encryption and decryption. The strength of a public-key cryptography system relies on the degree of difficulty (computational impracticality) for a properly generated private key to be determined from its corresponding public key. Security then depends only on keeping the private key private, and the public key may be published without compromising security. Public-key cryptography systems often rely on cryptographic algorithms based on mathematical problems that currently admit no efficient solution—particularly those inherent in certain integer factorization, discrete logarithm, and elliptic curve relationships. Public key algorithms, unlike symmetric key algorithms, do not require a secure channel for the initial exchange of one (or more) secret keys between the parties. Because of the computational complexity of asymmetric encryption, it is usually used only for small blocks of data, typically the transfer of a symmetric encryption key (e.g. a session key). This symmetric key is then used to encrypt the rest of the potentially long message sequence. The symmetric encryption/decryption is based on simpler algorithms and is much faster. Message authentication involves hashing the message to produce a "digest," and encrypting the digest with the private key to produce a digital signature. Thereafter anyone can verify this signature by (1) computing the hash of the message, (2) decrypting the signature with the signer's public key, and (3) comparing the computed digest with the decrypted digest. Equality between the digests confirms the message is unmodified since it was signed, and that the signer, and no one else, intentionally performed the signature operation — presuming the signer's private key has remained secret. The security of such procedure depends on a hash algorithm of such quality that it is computationally impossible to alter or find a substitute message that produces the same digest - but studies have shown that even with the MD5 and SHA-1 algorithms, producing an altered or substitute message is not impossible. The current hashing standard for encryption is SHA-2. The message itself can also be used in place of the digest. Public-key algorithms are fundamental security ingredients in cryptosystems, applications and protocols. They underpin various Internet standards, such as Transport Layer Security (TLS), S/MIME, PGP, and GPG. Some public key algorithms provide key distribution and secrecy (e.g., Diffie–Hellman key exchange), some provide digital signatures (e.g., Digital Signature Algorithm), and some provide both (e.g., RSA). Public-key cryptography finds application in, among others, the information technology security discipline, information security. Information security (IS) is concerned with all aspects of protecting electronic information assets against security threats. Public-key cryptography is used as a method of assuring the confidentiality, authenticity and non-repudiability of electronic communications and data storage.
Views: 678 The Audiopedia
NETWORK SECURITY - DIGITAL SIGNATURE ALGORITHM (DSA)
 
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Digital Signature : If the Sender Private key is used at encryption then it is called digital signature. This digital Signature is implemented two approaches 1) RSA Approach 2) DSS Approach.
Network Security - Public Key Infrastructure
 
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Fundamentals of Computer Network Security Launch you career in cyber security. This specialization in intended for IT professionals, computer programmers, managers, IT security professionals who like to move up ladder, who are seeking to develop network system security skills. Through four courses, we will cover the Design and Analyze Secure Networked Systems, Develop Secure Programs with Basic Cryptography and Crypto API, Hacking and Patching Web Applications, Perform Penetration Testing, and Secure Networked Systems with Firewall and IDS, which will prepare you to perform tasks as Cyber Security Engineer, IT Security Analyst, and Cyber Security Analyst. Course 1 - Design and Analyze Secure Networked Systems University of Colorado System About this Course In this MOOC, we will learn the basic cyber security concepts, how to identify vulnerabilities/threat in a network system. We will apply CIA basic security services in the triage of recent cyberattack incidents, such as OPM data breach. We will learn the risk management framework for analyzing the risks in a network system, and apply the basic security design principles to protect the data and secure computer systems. We will examine the trustworthiness of programs and data installed in our systems and show the proper way to verify their integrity and authenticity. We will apply principle of least privileges for controlling the shared access given to different groups of users and system processes. On Amazon Cloud instances, we will use GnuPG software to generate public/private key pair for signing/verifying documents and open source software, and for encrypting documents. We will learn how to publish software, the related signature and release key on web server and publish public key to PGP key server for others to retrieve. We will learn Public Key Infrastructure (PKI) and Linux utility to serve as a CA for an organization, learn how to sign certificate request for clients or servers in secure email and web applications. Module 4 - Be a CA, Setup Secure Server and Client Certificate Edward Chow In this module, we will learn the Public Key Infrastructure (PKI), how CA operates, and the certificates signing and verification process. We will utilize the utility command in a Linux system to serve as a CA for an organization, learn how to sign certificate request for clients or servers both secure email or secure web access purpose. We will earn how to generate server certificate requests as a webmaster, send them to CA for signing and install the signed certificates in Apache web server for secure web access. We will also set up apache web server for requiring clients to present their client certificates for mutual authentication. We will also guide you to set client certificate on browser for mutual authentication and on a mail client for signing and encrypting emails. Learning Objectives • By the end of this module, you should be able to setup PKI using Linux. • By the end of this module, you should be able to serve a CA to sign certificate for your own organization. • By the end of this module, you should be able to be setup secure web server certificate as a webmaster. • By the end of this module, you should be able to setup client browser with client certificate and set up server for mutual authentication.
Views: 293 intrigano
CISA Exam-Last Minute Revision- Asymmetric Encryption Domain 5   Copy
 
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Point to remember for CISA exam: (1)In any given scenario, when objective is to ensure ‘confidentiality’, message has to be encrypted using receiver’s public key. (2)In any given scenario, when objective is to ensure ‘authentication’, HASH of the message has to be created and HASH to be encrypted using sender’s private key. Please note that hash is also known as message digest. (3)In any given scenario, when objective is to ensure ‘integrity’, HASH of the message has to be created and HASH to be encrypted using sender’s private key. Please note that hash is also known as message digest. (4)In any given scenario, when objective is to ensure ‘confidentiality & authentication’, following treatment is required: -Hash of the message to be encrypted using sender’s private key (to ensure authentication/non-repudiation) -Message to be encrypted using receiver’s public key (to ensure confidentiality) (5)In any given scenario, when objective is to ensure ‘confidentiality & authentication & integrity’, following treatment is required: -Message to be encrypted using receiver’s public key (to ensure confidentiality) -Hash of the message to be encrypted using sender’s private key (to ensure authentication/non-repudiation and integrity)
Views: 1012 Hemang Doshi
What is Encryption [Hindi]
 
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Friends is video m hum Crytography,Encryption,Decryption,Symmetric key,Asymmetric key,Public key,Private key,Plain text and Cipher text kya hote hai in sb k bare main charcha krne wale hai or janne wale hai ki ye kya hote hai kaise ye kaam krte hai or in k kya kya fayde hai or sath hi hum ye bhi janenge ki Android Phone ko kaise encrypt kiya ja sakta hai toh is video ko End tak dekhen. I hope Aapko ye video Pasand aayegi Please Like,Share and SUBSCRIBE #JAI BHARAT It's My Passion Facebook :-https://www.facebook.com/TechnicalChoro Twitter:-https://twitter.com/TechnicalChoro Google+:-https://plus.google.com/b/114386885239188983906
Views: 17122 Technical Choro
Public and Private Keys - CompTIA Security+ SY0-301: 6.3
 
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See our entire index of CompTIA Security+ videos at http://www.FreeSecurityPlus.com - Asymmetric encryption technology has redefined our use of encryption with today's technology. In this video, you'll learn how this pair of keys allows use to encrypt, authenticate, manage non-repudiation, and validate our data.
Views: 13788 Professor Messer
What is a digital certificate and digital signature ? Working and all explained
 
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cryptography playlist : https://www.youtube.com/watch?v=_Yw7QWbk9Vs&list=PLf8bMP4RWebLVGpUnhji9Olkj1jdXfzFd What is a digital certificate ? What is a digital signature ? All about digital certificates and signatures . This video includes : advantages and disadvantages of digital certificates , working of digital certificates , in depth meaning of digital certificates and digital signatures , how public key of server gets shared with client securely , what could happen if digital certificates were forged , what is a certified authority , what is a self signed certificate , hierarchy of certified authorities , comparing digital signatures to real life signatures , comparing digital certificates to real life signatures and a lot more .
Views: 199866 Hacks And Security
NETWORK SECURITY - PUBLIC KEY DISTRIBUTION
 
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There are four ways to distribute the public keys among the users. 1) Public Announcement 2) Public Key Directory 3) Public Key Authority 4) Certificate Authority
PKI |public key infrastructure|digital signatures
 
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pki in cns, public key infrastructure,digital signatures in cryptographic network system
Views: 89 Ky support
Digital Signature
 
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Subject:Computer Science Paper: Cryptography and network
Views: 2785 Vidya-mitra
Cryptographic Hash functions - how your passwords and other credentials are stored in databases
 
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cryptographic hash functions - storing data in databases securely this video includes : what are hash functions , what is the use of hash functions , how confidential information like passwords are stored in databases , why do we use hash functions , properties or features of hash functions , what is an ideal hash etc I have used md5 hash an an example though md5 as per me is one of worst hashes but for learning point of view its best hash as per me . like my page on facebook : https://www.facebook.com/guidetohacking/
Views: 41120 Hacks And Security
RSA Cryptosystem Algorithm (Public Key Algorithm) in Hindi with Example
 
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RSA Cryptosystem Algorithm (Public Key Algorithm) in Hindi with Example Like FB Page - https://www.facebook.com/Easy-Engineering-Classes-346838485669475/ Complete Data Structure Videos - https://www.youtube.com/playlist?list=PLV8vIYTIdSna11Vc54-abg33JtVZiiMfg Complete Java Programming Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbL_fSaqiYpPh-KwNCavjIr Previous Years Solved Questions of Java - https://www.youtube.com/playlist?list=PLV8vIYTIdSnajIVnIOOJTNdLT-TqiOjUu Complete DBMS Video Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnYZjtUDQ5-9siMc2d8YeoB4 Previous Year Solved DBMS Questions - https://www.youtube.com/playlist?list=PLV8vIYTIdSnaPiMXU2bmuo3SWjNUykbg6 SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnb7av5opUF2p3Xv9CLwOfbq PL-SQL Programming Tutorials - https://www.youtube.com/playlist?list=PLV8vIYTIdSnadFpRMvtA260-3-jkIDFaG Control System Complete Lectures - https://www.youtube.com/playlist?list=PLV8vIYTIdSnbvRNepz74GGafF-777qYw4
NETWORK SECURITY - RSA ALGORITHM
 
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RSA Algorithm is the example for Public Key Encryption algorithm. Here we are supposed to find two keys 1) Public Key which is used at encryption 2) Private Key which is used at decryption step 1: Select two large Primes P , Q Step 2: Calculate n=P*Q & O(n) = (P-1)*(Q-1) Step 3: Assume e and d (Public and Private Key). Step 4: Encrypt the Plain Text using Public Key e. Step 5: Decrypt the Cipher Text using Private Key d.
Cryptography Basics in hindi
 
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All about cryptography and information security which a computer graduate must know. Cryptography or cryptology is the practice and study of techniques for secure communication in the presence of third parties called adversaries. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages;[3] various aspects in information security such as data confidentiality, data integrity, authentication, and non-repudiation[4] are central to modern cryptography. Modern cryptography exists at the intersection of the disciplines of mathematics, computer science, and electrical engineering. Applications of cryptography include military communications, electronic commerce, ATM cards, and computer passwords. Cryptography prior to the modern age was effectively synonymous with encryption, the conversion of information from a readable state to apparent nonsense. The originator of an encrypted message (Alice) shared the decoding technique needed to recover the original information only with intended recipients (Bob), thereby precluding unwanted persons (Eve) from doing the same. The cryptography literature often uses Alice ("A") for the sender, Bob ("B") for the intended recipient, and Eve ("eavesdropper") for the adversary.[5] Since the development of rotor cipher machines in World War I and the advent of computers in World War II, the methods used to carry out cryptology have become increasingly complex and its application more widespread. Modern cryptography is heavily based on mathematical theory and computer science practice; cryptographic algorithms are designed around computational hardness assumptions, making such algorithms hard to break in practice by any adversary. It is theoretically possible to break such a system, but it is infeasible to do so by any known practical means. These schemes are therefore termed computationally secure; theoretical advances, e.g., improvements in integer factorization algorithms, and faster computing technology require these solutions to be continually adapted. There exist information-theoretically secure schemes that provably cannot be broken even with unlimited computing power—an example is the one-time pad—but these schemes are more difficult to implement than the best theoretically breakable but computationally secure mechanisms. The growth of cryptographic technology has raised a number of legal issues in the information age. Cryptography's potential for use as a tool for espionage and sedition has led many governments to classify it as a weapon and to limit or even prohibit its use and export.In some jurisdictions where the use of cryptography is legal, laws permit investigators to compel the disclosure of encryption keys for documents relevant to an investigation.Cryptography also plays a major role in digital rights management and copyright infringement of digital media.
Views: 1181 Gyan Gurukool
Cryptography Meaning
 
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Video shows what cryptography means. The discipline concerned with communication security (eg, confidentiality of messages, integrity of messages, sender authentication, non-repudiation of messages, and many other related issues), regardless of the used medium such as pencil and paper or computers.. cryptography pronunciation. How to pronounce, definition by Wiktionary dictionary. cryptography meaning. Powered by MaryTTS
Views: 939 SDictionary
Information & Network Security Lecture --  Key Distribution Techniques | public-secret | (Eng-Hindi)
 
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-~-~~-~~~-~~-~- Please watch: "PL vs FOL | Artificial Intelligence | (Eng-Hindi) | #3" https://www.youtube.com/watch?v=GS3HKR6CV8E -~-~~-~~~-~~-~-
Views: 19389 Well Academy