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Cryptography basics: What is Encryption and Decryption
 
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Get Full Course: http://www.engineeringmentor.com/CNYTv3 Networks #3: This tutorial introduces the Cryptography basics. It also explains what is Encryption and Decryption. a) Cryptography basics (00:21):http://youtu.be/BEb_AnPWPwY?t=21s how do we provide this security during transmission? Well, One way of ensuring security can be use of CRYPTOGRAPHY! Cryptography is a field of network security which deals with hiding "real" infromation when it is under transmission between the two parties. Usually, the real information is transformed or hidden into another message and transmitted over the network. This transformed message in itself will make no sense even if any hacker gets hold of this information. When it reaches the destination, the receipent will know a method to de-transform the garbage message into the original information which the sender had sent.method of transforming message at sender's side and de transforming at reciever's side forms the basic model of Cryptography. b) Encryption and Decryption (3:57):http://youtu.be/BEb_AnPWPwY?t=3m57s First, the information to be transmitted, called as plain text(or message) is fed to an Encryption system. The Encyrption system uses a key to convert the plain text to encyrpted form which looks like garbage value. This is also called as cipher text. A corresponding key is used at the other end to decrypt the cipher text back to original message. When we say a key, it actually means a piece of string value which is fed to encyprtion and decryption algorithms along with the text for transformation. When the message reaches the destination, this system at the other end decrypts the cipher text into original message with the help of the key. This is called as Decryption System. The output of the Decryption System is the intended message. Depending on how the keys are shared, we can classify crytography as symmetric and asymmetric. If the keys used by both parties are same, then it is called symmetric key cryptography, or private key cryptography. If both parties use different keys for encyrption and decryption, then it is called asymmetric key cryptography or public key cryptography. video URL : https://www.youtube.com/watch?v=BEb_AnPWPwY Watch ALL CN VIDEOS: https://www.youtube.com/playlist?list=PL9OIoIp8YySF4mkIihOb_j2HZIRIlYuEx For more, visit http://www.EngineeringMentor.com Facebook: https://www.facebook.com/EngineeringMentor Twitter : https://twitter.com/Engi_Mentor
Views: 95564 Skill Gurukul
What is Cryptography - Introduction to Cryptography - Lesson 1
 
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In this video I explain the fundamental concepts of cryptography. Encryption, decryption, plaintext, cipher text, and keys. Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm Donate - http://bit.ly/19AHMvX
Views: 86432 Learn Math Tutorials
Cryptography: Crash Course Computer Science #33
 
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Today we’re going to talk about how to keep information secret, and this isn’t a new goal. From as early as Julius Caesar’s Caesar cipher to Mary, Queen of Scots, encrypted messages to kill Queen Elizabeth in 1587, theres has long been a need to encrypt and decrypt private correspondence. This proved especially critical during World War II as Allan Turing and his team at Bletchley Park attempted to decrypt messages from Nazi Enigma machines, and this need has only grown as more and more information sensitive tasks are completed on our computers. So today, we’re going to walk you through some common encryption techniques such as the Advanced Encryption Standard (AES), Diffie-Hellman Key Exchange, and RSA which are employed to keep your information safe, private, and secure. Note: In October of 2017, researchers released a viable hack against WPA2, known as KRACK Attack, which uses AES to ensure secure communication between computers and network routers. The problem isn't with AES, which is provably secure, but with the communication protocol between router and computer. In order to set up secure communication, the computer and router have to agree through what's called a "handshake". If this handshake is interrupted in just the right way, an attacker can cause the handshake to fault to an insecure state and reveal critical information which makes the connection insecure. As is often the case with these situations, the problem is with an implementation, not the secure algorithm itself. Our friends over at Computerphile have a great video on the topic: https://www.youtube.com/watch?v=mYtvjijATa4 Produced in collaboration with PBS Digital Studios: http://youtube.com/pbsdigitalstudios Want to know more about Carrie Anne? https://about.me/carrieannephilbin The Latest from PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV Want to find Crash Course elsewhere on the internet? Facebook - https://www.facebook.com/YouTubeCrash... Twitter - http://www.twitter.com/TheCrashCourse Tumblr - http://thecrashcourse.tumblr.com Support Crash Course on Patreon: http://patreon.com/crashcourse CC Kids: http://www.youtube.com/crashcoursekids
Views: 169569 CrashCourse
INTRODUCTION TO CRYPTOGRAPHY IN HINDI
 
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find relevant notes at-https://viden.io/
Views: 55283 LearnEveryone
What is a DMZ?
 
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In this video you will learn how you can use a DMZ for data exchange between several networks without a direct connection between these networks. For more Information, visit http://support.automation.siemens.com/WW/view/en/22531370
Views: 129390 Siemens
Virus, Worms and Trojan Horses Brief Introduction and Difference between their Functionality
 
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Virus, Worms and Trojan Horses Brief Introduction and Difference between their Functionality Keywords: Virus Worms Trojan Horses Network Security Notes
Network Security - Basic Cryptography
 
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Fundamentals of Computer Network 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 2 Basic Cryptography and Programming with Crypto API: About this course: In this MOOC, we will learn the basic concepts and principles of cryptography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account. Module 1 - Basic Cryptography In this module we learn the basic concepts and principles of crytography, introduce the basic concept of cryptoanalysis using mono-alphabetic substitution cipher as an example, and discuss the one-time-pad and quantum key distribution concepts. Learning Objectives • Compose secure program with Crypto API for encryption, authentication, and integrity checking • Understand terminologies of basic cryptography • Understand Kerchhoff Principle • Apply cryptoanalysis techniques on mono-alphabetic ciphers • Explain why one time pad is strongest and understand how quantum key can be distributed
Views: 132 intrigano
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.
Network Security - Basic Concepts Definitions & Types of Attacks
 
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This is a introductory video to a domain of Information technology that is Network security. Definition of Network Security: Network security is protection of the access to files, directories and information in a computer network against hacking, misuse and unauthorized changes to the system. In this video tutorial the basics of Network security, some definitions, terms and concepts. We've also covered some types of attacks that take place when Network security is not implemented properly. If you like the video give it a thumbs up and also share it with your friends. Do subscribe to our channel as you will get notified when we upload new video tutorials. If you have any suggestions or tips for us do post them in the comments section below we'll be happy to apply them for you. Peace Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 113684 Simple Snippets
NETWORK SECURITY - TYPES OF ATTACKS
 
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Two Categories of attacks 1) Passive Attacks a) Release of the content b) Traffic Analysis 2) Active Attacks a) Masquerade b) Replay c) Modification of Message d) Denial of Service
Principles of Network Security and Cryptography
 
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In this video tutorial we study the basic principles of Network security and also see the concept of Cryptography by understanding a basic example. Principles of Network Security to be discussed in this video are as follows: Confidentiality Authentication Integrity Non-repudiation Access Control Availability We will also learn the concept of Cryptography in this tutorial. Here's the definition of Cryptography: Cryptography is the art of achieving security by encoding messages to make them non-readable This video is a continuation of the previous video so make sure you check that video as well so that you get to know some basics of Network security. Download the FREE Network Security App on Google Playstore for Android - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials Simple Snippets on Facebook- https://www.facebook.com/simplesnippets/ Simple Snippets on Instagram- https://www.instagram.com/simplesnipp... Simple Snippets Google Plus Page- https://plus.google.com/+SimpleSnippets Simple Snippets email ID- [email protected] Download my FREE Network Security Android App - https://play.google.com/store/apps/details?id=com.intelisenze.networksecuritytutorials For Classroom Coaching in Mumbai for Programming & other IT/CS Subjects Checkout UpSkill Infotech - https://upskill.tech/ UpSkill is an Ed-Tech Company / Coaching Centre for Information Technology / Computer Science oriented courses and offer coacing for various Degree courses like BSc.IT, BSc.CS, BCA, MSc.IT, MSc.CS, MCA etc. Contact via email /call / FB /Whatsapp for more info email - [email protected] We also Provide Certification courses like - Android Development Web Development Java Developer Course .NET Developer Course Check us out on Social media platforms like Facebook, Instagram, Google etc Facebook page - https://www.facebook.com/upskillinfotech/ Insta page - https://www.instagram.com/upskill_infotech/ Google Maps - https://goo.gl/maps/vjNtZazLzW82
Views: 20269 Simple Snippets
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.
Chinese Remainder Theorem  | Cryptography And Network Security
 
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Step by step instructions on how to use The Chinese Remainder Theorem to solve a system of linear congruence. Visit Our Channel :- https://www.youtube.com/channel/UCxikHwpro-DB02ix-NovvtQ In this lecture we have taught about what how to solve multiplicative cipher method. Follow Smit Kadvani on :- Facebook :- https://www.facebook.com/smit.kadvani Instagram :- https://www.instagram.com/the_smit0507 Follow Dhruvan Tanna on :- Facebook :- https://www.facebook.com/dhruvan.tanna1 Instagram :- https://www.instagram.com/dhru1_tanna Follow Keyur Thakkar on :- Facebook :- https://www.facebook.com/keyur.thakka... Instagram :- https://www.instagram.com/keyur_1982 Snapchat :- keyur1610 Follow Ankit Soni on:- Facebook :- https://www.facebook.com/ankitsoni.1511 Instagram :- https://www.instagram.com/ankit_soni1511
Views: 35355 Quick Trixx
What is Modular Arithmetic - Introduction to Modular Arithmetic - Cryptography - Lesson 2
 
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Modular Arithmetic is a fundamental component of cryptography. In this video, I explain the basics of modular arithmetic with a few simple examples. Learn Math Tutorials Bookstore http://amzn.to/1HdY8vm Donate - http://bit.ly/19AHMvX
Views: 120658 Learn Math Tutorials
Asymmetric encryption - Simply explained
 
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How does public-key cryptography work? What is a private key and a public key? Why is asymmetric encryption different from symmetric encryption? I'll explain all of these in plain English! 🐦 Follow me on Twitter: https://twitter.com/savjee ✏️ Check out my blog: https://www.savjee.be 👍🏻 Like my Facebook page: https://www.facebook.com/savjee
CHAPTER 12 FIREWALL Networking Basic
 
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W1Channel Recommended Books to Learn More about Netorking https://goo.gl/x0qr2d W1Channel Recommended Books to Learn More about PC Hardware https://goo.gl/wGi8RU
Views: 231756 W1Channel
Encryption as Fast As Possible
 
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How does data travel around the internet without becoming publicly visible? Encryption! But what is encryption?... Massdrop link: http://dro.ps/techquickie
Views: 393080 Techquickie
Will Quantum Computers break encryption?
 
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How do you secure messages over the internet? How do quantum computers break it? How do you fix it? Why don't you watch the video to find out? Why does this description have so many questions? Why are you still reading? What is the meaning of life? Facebook: https://www.facebook.com/frameofessence Twitter: https://twitter.com/frameofessence YouTube: https://www.youtube.com/user/frameofessence CLARIFICATIONS: You don't actually need a quantum computer to do quantum-safe encryption. As briefly mentioned at 7:04 , there are encryption schemes that can be run on regular computers that can't be broken by quantum computers. CORRECTIONS: [2:18] Technically, you can use any key to encrypt or decrypt whatever you want. But there's a specific way to use them that's useful, which is what's shown in the video. [5:36] In RSA, depending on exactly what you mean by "private key", neither key is actually derivable from the other. When they are created, they are generated together from a common base (not just the public key from the private key). But typically, the file that stores the "private key" actually contains a bit more information than just the private key. For example, in PKCS #1 RSA private key format ( https://tools.ietf.org/html/rfc3447#appendix-A.1.2 ), the file technically contains the entire public key too. So in short, you technically can't get the public key from the private key or vice versa, but the file that contains the private key can hold more than just the private key alone, making it possible to retrieve the public key from it. Video links: Encryption and HUGE numbers - Numberphile https://youtu.be/M7kEpw1tn50 The No Cloning Theorem - minutephysics https://youtu.be/owPC60Ue0BE Quantum Entanglement & Spooky Action at a Distance - Veritasium https://youtu.be/ZuvK-od647c Sources: Quantum Computing for Computer Scientists http://books.google.ca/books/about/Quantum_Computing_for_Computer_Scientist.html?id=eTT0FsHA5DAC Random person talking about Quantum MITM attacks http://crypto.stackexchange.com/questions/2719/is-quantum-key-distribution-safe-against-mitm-attacks-too The Ekert Protocol (i.e. E91) http://www.ux1.eiu.edu/~nilic/Nina's-article.pdf Annealing vs. Universal Quantum Computers https://medium.com/quantum-bits/what-s-the-difference-between-quantum-annealing-and-universal-gate-quantum-computers-c5e5099175a1 Images, Documents, and Screenshots: Post-Quantum Cryptography initiatives http://csrc.nist.gov/groups/ST/post-quantum-crypto/cfp-announce-dec2016.html http://pqcrypto.eu.org/docs/initial-recommendations.pdf Internet map (Carna Botnet) http://census2012.sourceforge.net/ Quantum network maps https://www.slideshare.net/ADVAOpticalNetworking/how-to-quantumsecure-optical-networks http://www.secoqc.net/html/press/pressmedia.html IBM Quantum http://research.ibm.com/ibm-q/ Music: YouTube audio library: Blue Skies Incompetech: Jay Jay Pamgaea The House of Leaves Premium Beat: Cutting Edge Technology Second Time Around Swoosh 1 sound effect came from here: http://soundbible.com/682-Swoosh-1.html ...and is under this license: https://creativecommons.org/licenses/sampling+/1.0/
Views: 473453 Frame of Essence
NETWORK SECURITY - DIFFIE HELLMAN KEY EXCHANGE ALGORITHM
 
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This Algorithm is used to exchange the secret /symmetric key between sender and receiver. This exchange of key can be done with the help of public key and private key step 1 Assume prime number p step 2 Select a such that a is primitive root of p and a less than p step 3 Assume XA private key of user A step 4 Calculate YA public key of user A with the help of formula step 5 Assume XB private key of user B step 6 Calculate YB public key of user B with the help of formula step 7 Generate K secret Key using YB and XA with the help of formula at Sender side. step 8 Generate K secret Key using YA and XB with the help of formula at Receiver side.
Hashing Algorithms and Security - Computerphile
 
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Audible free book: http://www.audible.com/computerphile Hashing Algorithms are used to ensure file authenticity, but how secure are they and why do they keep changing? Tom Scott hashes it out. More from Tom Scott: http://www.youtube.com/user/enyay and https://twitter.com/tomscott http://www.facebook.com/computerphile https://twitter.com/computer_phile This video was filmed and edited by Sean Riley. Pigeon Sound Effects courtesy of http://www.freesfx.co.uk/ Computerphile is a sister project to Brady Haran's Numberphile. See the full list of Brady's video projects at: http://bit.ly/bradychannels
Views: 705274 Computerphile
Quantum Cryptography Explained
 
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This episode is brought to you by Squarespace: http://www.squarespace.com/physicsgirl With recent high-profile security decryption cases, encryption is more important than ever. Much of your browser usage and your smartphone data is encrypted. But what does that process actually entail? And when computers get smarter and faster due to advances in quantum physics, how will encryption keep up? http://physicsgirl.org/ ‪http://twitter.com/thephysicsgirl ‪http://facebook.com/thephysicsgirl ‪http://instagram.com/thephysicsgirl http://physicsgirl.org/ Help us translate our videos! http://www.youtube.com/timedtext_cs_panel?c=UC7DdEm33SyaTDtWYGO2CwdA&tab=2 Creator/Editor: Dianna Cowern Writer: Sophia Chen Animator: Kyle Norby Special thanks to Nathan Lysne Source: http://gva.noekeon.org/QCandSKD/QCand... http://physicsworld.com/cws/article/n... https://epic.org/crypto/export_contro... http://fas.org/irp/offdocs/eo_crypt_9... Music: APM and YouTube
Views: 261521 Physics Girl
Cryptography Lesson #1 - Block Ciphers
 
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This tutorial video will help provide an understanding of what block ciphers are, and how they are used in the field of cryptography.
Views: 117932 Ryan Kral
Demilitarized Zone (DMZ) Introduction, Architecture of DMZ, Advantages of DMZ over Normal Firewall
 
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Demilitarized Zone (DMZ) - Introduction, Architecture of DMZ, Advantages of DMZ over Normal Firewall Keywords: DMZ Network Security Notes
The one-time pad | Journey into cryptography | Computer Science | Khan Academy
 
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The perfect cipher Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/frequency-stability?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/crypt/v/polyalphabetic-cipher?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 415350 Khan Academy
NETWORK SECURITY - BLOCK CIPHER MODES OF OPERATION
 
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1. Electronic Code Book Mode 2. Cipher Block Chaining Mode 3. Output Feedback Mode 4. Cipher Feedback Mode 5. Counter Mode
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
What Is Meant By Cryptography?
 
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If you want to keep information secret, have two possible strategies hide the existence of information, or make this tutorial is meant for students computer science who aspire learn basics cryptography. The term is most cryptography definition involves creating written or generated codes that allows information to be kept secret. Cipher or what is a cryptographic key? Definition from techopedia. Cryptography defined brief history laitscryptography definition from pc magazine encyclopediacipher or cryptographic algorithm dictionary. It will be useful for networking professionals as well who the conversion of data into a secret code transmission over public network. Definition of 'cryptography' the economic times. See also, a definition of pci strong cryptography in database context, key is field that selected for sorting. What is strong cryptography? Definition from whatis. See more define cryptography the process of writing or reading secret messages codes in a sentence defined brief history. Encrypted messages can sometimes be broken by cryptanalysis, also called codebreaking, although modern cryptography techniques are virtually unbreakable definition of discipline or employed in protecting integrity secrecy electronic converting them into unreadable introduction to cryptographyprocess data unintelligible form, reversibly, without loss typically digitally. It will be useful for networking professionals as well who cryptography defined brief history. What is cryptography? Definition from techopediawhat Webopedia definition. What is cryptography? (video). It is a method of storing and this definition explains the elements strong cryptography, what its purpose how it used. Cryptography is an ancient science that cryptographic key definition a string of bits used by algorithm to transform plain text into cipher or cryptography associated with the process converting ordinary unintelligible and vice versa. Today, most cryptography is digital, and the original text ('plaintext') turned in cryptography, a cryptosystem suite of cryptographic algorithms needed to implement particular security service, commonly for achieving scientific field providing information through reversible alteration data known as. Cryptography converts cryptography or cryptology (from greek krypts, 'hidden, secret'; And graphein, 'writing', logia, 'study', respectively) is the practice and study of techniques for secure communication in presence third parties called adversaries only those who possess a secret key can decipher (or decrypt) message into plain text. What is key? Definition from whatis searchsecurity. Cryptography is a method of storing and transmitting data in particular form so that only those for whom it intended can read process. In cryptography, a key is variable value that applied using an algorithm to string or block of 27 mar 2012 Cryptography? Definition from whatis. Usually one to in cryptography definition, the science or study of techniques secret writin
Views: 7 Til Til
NETWORK SECURITY - SECURE SOCKET LAYER - PART 1 (SSL RECORD PROTOCOL)
 
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SSL is implemented using SSL protocol stack 1.SSL Record Protocol 2.Handshake Protocol 3.Change Cipher Spec Protocol 4.Alert Protocol
Kerberos in Hindi – Network Authentication Protocol, KDC, AS, TGS
 
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Kerberos in Hindi – Network Authentication Protocol, KDC, AS, TGS 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
What Is Meant By Cryptography And Network Security?
 
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It means the digital signatures are central to operation of public key infrastructures and many network security schemes (e. We end the presentation with a discussion of rsa algorithm, and web communication cryptography network security. ) 14 jul 2015 understand the basics of cryptography to keep your networks, systems, and data secure cryptography tutorial for beginners learn cryptography in simple and easy it explains how programmers and network professionals can use cryptography to this tutorial is meant for students of computer science who aspire to learn the definition of cryptography discipline or techniques employed in protecting integrity or secrecy of electronic network the overconfident security expert bragged endlessly about his 'superior ' cryptography skills, yet the sophisticated hacker definition of cryptography discipline or techniques employed in protecting integrity or secrecy of electronic network the overconfident security expert bragged endlessly about his 'superior ' cryptography skills, yet the sophisticated hacker if you take a close look at the meaning behind the key word in the phrase cryptography in network security, you will have a good idea of what is meant by the cryptography and network security video lectures, iit kharagpur online course, free tutorials for free download security also depends on key password, to keep data secure. Fifth edition key security concepts• Can define 3 levels of impact from a Network and cryptography slideshare. Ssl tls, many vpns, etc. A beginners guide from comodo. Terminology cryptography vs security stack the concept of trust in network entrust. What is cryptography? Webopedia definition. Cryptography for network and information security technetlearning cryptography lynda what is cryptography? Definition meaning businessdictionary in. Cryptography, which translates as 'secret writing,' refers to the science of concealing meaning data so only specified parties understand a transmission's contents cryptography definition involves creating written or generated codes that allows information security uses on several levels internet and other forms electronic communication become more prevalent, is becoming increasingly important. Public key cryptography requires access to users' public nptel provides e learning through online web and video courses various streams network securitydeptdefine cryptanalysiswhat is meant by andoverview & chapter 1. Cryptography? Definition from whatis however, in today's computer centric world, cryptography is most often associated with scrambling plaintext (ordinary text, sometimes referred to as cleartext) into ciphertext (a process called encryption), then back again (known decryption) 19 mar 2010 a brief discussion of network security and an introduction. So what ever cryptography produces it must make data network secure in a security solution such as entrust, there are two important forms of trust that. Web communication cryptography and network s
Views: 17 Til Til
NETWORK SECURITY - IP SECURITY PART 1 (AUTHENTICATION HEADER)
 
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IP SECURITY SERVICES 1. AUTHENTICATION WITH INTEGRITY 2.CONFIDENTIALITY IP SECURITY ARCHITECTURE 1. AUTHENTICATION HEADER PROTOCOL 2.ENCAPSULATING SECURITY PAYLOAD PROTOCOL 3.KEY MANAGEMENT
Introduction to Cryptography and system security | CSS series #1
 
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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: 100019 Last moment tuitions
NETWORK SECURITY - FEISTEL STRUCTURE
 
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FEISTEL STRUCTURE Most of the block ciphers follows the Feistel Structure. Plain text is processed in terms of blocks Plain text is divided into two equal halves Plain text is processed in number of rounds Sub Keys are generated for each round.
Intrusion Detection System Introduction, Types of Intruders in Hindi with Example
 
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Intrusion Detection System Introduction, Types of Intruders 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
Firewall Introduction Architecture, Characteristics of Good Firewall, Limitations of Firewall
 
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Firewall Introduction - Architecture, Characteristics of Good Firewall, Limitations of Firewall Keywords: Firewall Limitations of Firewall Firewall Characteristics Firewall Architecture Network Security Notes
Symmetric Key and Public Key Encryption
 
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Modern day encryption is performed in two different ways. Check out http://YouTube.com/ITFreeTraining or http://itfreetraining.com for more of our always free training videos. Using the same key or using a pair of keys called the public and private keys. This video looks at how these systems work and how they can be used together to perform encryption. Download the PDF handout http://itfreetraining.com/Handouts/Ce... Encryption Types Encryption is the process of scrambling data so it cannot be read without a decryption key. Encryption prevents data being read by a 3rd party if it is intercepted by a 3rd party. The two encryption methods that are used today are symmetric and public key encryption. Symmetric Key Symmetric key encryption uses the same key to encrypt data as decrypt data. This is generally quite fast when compared with public key encryption. In order to protect the data, the key needs to be secured. If a 3rd party was able to gain access to the key, they could decrypt any data that was encrypt with that data. For this reason, a secure channel is required to transfer the key if you need to transfer data between two points. For example, if you encrypted data on a CD and mail it to another party, the key must also be transferred to the second party so that they can decrypt the data. This is often done using e-mail or the telephone. In a lot of cases, sending the data using one method and the key using another method is enough to protect the data as an attacker would need to get both in order to decrypt the data. Public Key Encryption This method of encryption uses two keys. One key is used to encrypt data and the other key is used to decrypt data. The advantage of this is that the public key can be downloaded by anyone. Anyone with the public key can encrypt data that can only be decrypted using a private key. This means the public key does not need to be secured. The private key does need to be keep in a safe place. The advantage of using such a system is the private key is not required by the other party to perform encryption. Since the private key does not need to be transferred to the second party there is no risk of the private key being intercepted by a 3rd party. Public Key encryption is slower when compared with symmetric key so it is not always suitable for every application. The math used is complex but to put it simply it uses the modulus or remainder operator. For example, if you wanted to solve X mod 5 = 2, the possible solutions would be 2, 7, 12 and so on. The private key provides additional information which allows the problem to be solved easily. The math is more complex and uses much larger numbers than this but basically public and private key encryption rely on the modulus operator to work. Combing The Two There are two reasons you want to combine the two. The first is that often communication will be broken into two steps. Key exchange and data exchange. For key exchange, to protect the key used in data exchange it is often encrypted using public key encryption. Although slower than symmetric key encryption, this method ensures the key cannot accessed by a 3rd party while being transferred. Since the key has been transferred using a secure channel, a symmetric key can be used for data exchange. In some cases, data exchange may be done using public key encryption. If this is the case, often the data exchange will be done using a small key size to reduce the processing time. The second reason that both may be used is when a symmetric key is used and the key needs to be provided to multiple users. For example, if you are using encryption file system (EFS) this allows multiple users to access the same file, which includes recovery users. In order to make this possible, multiple copies of the same key are stored in the file and protected from being read by encrypting it with the public key of each user that requires access. References "Public-key cryptography" http://en.wikipedia.org/wiki/Public-k... "Encryption" http://en.wikipedia.org/wiki/Encryption
Views: 429588 itfreetraining
Types of firewall  | network firewall security | TechTerms
 
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Learn different types of firewall, types of firewall software, types of hardware firewall, different types of firewalls, types of firewalls, types firewall, types of firewalls in network security, different types of hardware firewalls, types of firewall, different types of firewall, firewall configuration types, firewall types, 7 types of firewall, types of firewall in network security, types of firewall with diagram, firewall and types of firewall, types of network firewalls, firewall and its types, what is firewall and types of firewall, types of firewall architecture, types of firewall in networking, different types of firewall in network security, what is firewall and write the types of firewall, types of firewall attacks, firewall and types, firewall types and configuration, different types of firewalls and their functions. Follow us on Facebook: https://www.facebook.com/DGTechTerms/ Follow us on Twitter: https://twitter.com/Technical_Terms Firewalls protect our computers from internet hackers. Internet hackers can steal our bank details from our computers and can reduce our bank balance from 1000s of dollars to 0 in seconds. So, firewall is must in a computer / computer network. Starting with packet filtering firewall. Suppose, I am downloading a file from internet. When the data-packet arrives a packet-filtering firewall, it only checks sender’s and receiver’s IP address and the port number. If the everything is OK, then data packet is allowed to pass through packet-filtering firewall and then to my computer. This checking process is done as per rules written in a list called access control list. The only limitation (caveats) of packet filtering firewall is that it do not checks the data portion, i.e. Payload, of the data packet. So, a hacker could send some malicious data packed in this payload section. The 2nd one is application / proxy firewall: proxy firewall do not let the web server know which computer actually wants to visit the requested website, i.e. proxy firewall hides us from the attackers in internet. Since, the application firewalls also check the data contents of the received data packet so they are generally much slower than packet-filtering firewalls. 3rd is Hybrid firewalls: Hybrid firewalls combines packet filtering firewall and application firewall in series to enhance the security. If they are connected in parallel then the security of the connection will be reduced to the parameters defined by the packet filtering firewall, i.e. application firewall will be of no use if the two firewalls are connected in parallel. For this reason, hybrid firewalls use packet filtering and application firewall in series. -~-~~-~~~-~~-~- Please watch: "Computer Network Administrator – 5 Important Questions and answers" https://www.youtube.com/watch?v=4mKcQ1_vQjc -~-~~-~~~-~~-~-
Views: 184700 TechTerms
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: 163165 Technical Guruji
What is Encryption and Decryption ? | Concept Explained (in Hindi)
 
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In this video we will discuss about encryption and decryption. How these things works and why we need these. Watch the full video to know more about this topic. Like the video and please share with your friends. Subscribe to my channel for more video like this and to support my effort. Catch me on Social Networking Websites Like my Facebook Page: https://www.facebook.com/technicalsagarindia Twitter: https://twitter.com/iamasagar
Views: 98306 Technical Sagar
IPSec/ IKE/ ESP/AH/ Tunnel/ Transport (Hindi)
 
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IPSec is a framework to protect IP packet. This video provides overview on IPSec/ IKE/ ESP/AH in Hindi for beginners
Views: 57852 Bhairave Maulekhi
What is NAT in Hindi (Network Address Translation) - NAT PAT - Part 1
 
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NAT PAT Tutorial Hindi by Jagvinder Thind explains What is NAT or NAT Concepts & Types of NAT in hindi. CCNA in Hindi. Network configuration on Cisco Router CCNA Training Video In Hindi
Views: 125911 JagvinderThind
The discrete logarithm problem | Journey into cryptography | Computer Science | Khan Academy
 
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A mathematical lock using modular arithmetic Watch the next lesson: https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/diffie-hellman-key-exchange-part-2?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Missed the previous lesson? https://www.khanacademy.org/computing/computer-science/cryptography/modern-crypt/v/diffie-hellman-key-exchange-part-1?utm_source=YT&utm_medium=Desc&utm_campaign=computerscience Computer Science on Khan Academy: Learn select topics from computer science - algorithms (how we solve common problems in computer science and measure the efficiency of our solutions), cryptography (how we protect secret information), and information theory (how we encode and compress information). About Khan Academy: Khan Academy is a nonprofit with a mission to provide a free, world-class education for anyone, anywhere. We believe learners of all ages should have unlimited access to free educational content they can master at their own pace. We use intelligent software, deep data analytics and intuitive user interfaces to help students and teachers around the world. Our resources cover preschool through early college education, including math, biology, chemistry, physics, economics, finance, history, grammar and more. We offer free personalized SAT test prep in partnership with the test developer, the College Board. Khan Academy has been translated into dozens of languages, and 100 million people use our platform worldwide every year. For more information, visit www.khanacademy.org, join us on Facebook or follow us on Twitter at @khanacademy. And remember, you can learn anything. For free. For everyone. Forever. #YouCanLearnAnything Subscribe to Khan Academy’s Computer Science channel: https://www.youtube.com/channel/UC8uHgAVBOy5h1fDsjQghWCw?sub_confirmation=1 Subscribe to Khan Academy: https://www.youtube.com/subscription_center?add_user=khanacademy
Views: 132929 Khan Academy Labs
Confidentiality, Integrity, and Availability of Computer Security
 
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http://www.365computersecuritytraining.com This video explains the CIA Triangle of computer security. For more FREE IT Security training videos visit our site! +CONFIDENTIALITY +INTEGRITY +AVAILABILITY These three are the fundamental characteristics of data that must be protected. Confidentiality means that only authorized persons can access information. Integrity ensures that the information is correct. Availability ensures that the data is readily available when an authorized persons wants to access it. Information Security attempts to safeguard these characteristics.
Views: 37309 365ComputerSecurity
Cryptography and Network Security - Hash Functions - GATE Computer Science
 
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The complete YouTube playlist can be viewed here: https://goo.gl/mjyDev This lesson explains the concept of the Hash Functions, under the course, "Cryptography and Network Security for GATE Computer Science Engineering". The lesson explains the questions on the following subtopics: Hash Functions Hash Functions - Method 1 to 6 Some important terminology and concepts are also illustrated, for the better understanding of the subject. For the entire course: https://goo.gl/aTMBNZ For more lessons by Ansha Pk: https://goo.gl/2DX9Wn Must watch for all the GATE/ESE/PSU Exams. Download the Unacademy Learning App from the Google Play Store here:- https://goo.gl/02OhYI Download the Unacademy Educator app from the Google Play Store here: https://goo.gl/H4LGHE Do Subscribe and be a part of the community for more such lessons here: https://goo.gl/UGFo7b Visit Our Facebook Group on GATE here: https://goo.gl/cPj5sb Cryptography and Network Security - Hash Functions - GATE Computer Science
Cryptographic Hash functions - how your passwords and other credentials are stored in databases
 
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Subscribe to our new youtube channel also : https://www.youtube.com/channel/UCNx1Gkyy9LfOxDMbcOKuV4g 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: 44982 Hacks And Security
Cryptography- Network Security
 
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Cryptography-Network Security: In this lesson, Yashika Tandon teaches about network security and its various threats. This lesson also covers the network security - cryptography. Network security is protection of the access to files, directories and information in a computer network against hacking, misuse and unauthorized changes to the system. In this lesson the basics of Network security, some definitions, terms and concepts.This course provides a complete knowledge on the concept of cryptography and how it can be implemented to protect the messages. You can watch the full list of courses and start discussions with the educator here: https://goo.gl/5fcBJV For more educational lessons by top educators download the Unacademy Learning App from Android Playstore: https://play.google.com/store/apps/details?id=com.unacademyapp&hl=en or visit http://unacademy.com
What is Firewall? Good or Bad? Explained in Detail
 
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Namaskaar Dosto, is video mein maine aapko firewall ke baare mein bataya hai, aap sabhi ne internet use karte time firewall ke baare mein jarur suna hoga, ab maine aapko bataya hai ki firewall kya hai? firewall kya kaam karta hai? aur aapko firewall ki kya jarurat hai? Dosto firewall ek security ki layer hai jo aapko computer ko protect karta hai malicious attacks se, yeh ek hardware bhi ho sakta hai, aur software bhi ho sakta hai, aur firewall ki madad se administration bhi kar sakte hai, kyuki jaise kisi country mein koi specific service agar government ko block karni hai toh bhi firewall kaam mein aata hai, aap yeh video dekhiye aur aapko pata chal jayega ki firewall kya hai, aur internet use karte time aapko firewall use karna kyu jaruri hai. Mujhe umeed hai ki firewall ke baare mein banayi gayi yeh video aapko pasand aayegi. 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: 218516 Technical Guruji