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Cryptography PKCS 1 (Public Key Encryption from trapdoor permutations)
 
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PKCS 1 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: 945 intrigano
web crypto api rsassa-pkcs1-v1_5 public private keys and perform sign and verify message
 
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Refrence https://8gwifi.org/docs/window-crypto-rsassa.jsp web crypto api rsassa-pkcs1-v1_5 public private keys and perform sign and verify message The Web crypto api RSASSA-PKCS1-v1_5 algorithm identifier is used to perform signing and verification using the RSASSA-PKCS1-v1_5 algorithm specified in [RFC3447] and using the SHA hash functions defined in this specification. - **Sign**: Perform the signature generation operation - **Verify**: Perform the signature verification operation - **Generate Key**: Generate an RSA key pair, with RSA modulus length equal to the modulusLength attribute of normalizedAlgorithm and RSA public exponent equal to the publicExponent attribute of normalizedAlgorithm web crypto api example web crypto api tutorial web crypto rsa sign message example web crypto sign example webcrypto generatekey example webcrypto hash example
Views: 14 Zariga Tongy
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: 531097 Frame of Essence
Cryptography 11.4| PKCS 1 23 min
 
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Introduction to Cryptography - I ===================== Materials (video, slides, english subtitles) from / Stanford Introduction to Cryptography Slides & Subtitle Link: http://www.mediafire.com/file/rr8pnxag9kpe3g7/Crypto-I.rar/file 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. Throughout the course participants will be exposed to many exciting open problems in the field and work on fun (optional) programming projects. In a second course (Crypto II) we will cover more advanced cryptographic tasks such as zero-knowledge, privacy mechanisms, and other forms of encryption. SKILLS YOU WILL GAIN During the 66 Video in this Course: 1 - Cryptography, 2 - Cryptographic Attacks, 3 - Public-Key Cryptography, 4 - Symmetric-Key Algorithm,
Views: 10 TO Courses
Kryptographie #37 - RSA PKCS #1 v1 5
 
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In diesem Tutorial geht es um ein tatsächlich verwendetes RSA-Verfahren. Buchempfehlung: Introduction to Modern Cryptography von Katz und Lindell: http://amzn.to/2qu6CNb ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
PKCS 1
 
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In cryptography, PKCS #1 is the first of a family of standards called Public-Key Cryptography Standards, published by RSA Laboratories. It provides the basic definitions of and recommendations for implementing the RSA algorithm for public-key cryptography. It defines the mathematical properties of public and private keys, primitive operations for encryption and signatures, secure cryptographic schemes, and related ASN.1 syntax representations. The current version is 2.2. Compared to 2.1, which was republished as RFC 3447, version 2.2 updates the list of allowed hashing algorithms to align them with FIPS 180-4, therefore adding SHA-224, SHA-512/224 and SHA-512/256. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 844 Audiopedia
learn cryptography learn the following pkcs refrences
 
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PUBLIC-KEY CRYPTOGRAPHY STANDARDS Numbers PKCS#1 RSA CRYPTOGRAPHY STANDARD PKCS#2 PKCS#3 DIFFIE-HELLMAN KEY AGREEMENT STANDARD PKCS#4 PKCS#5 PASSWORD-BASED CRYPTOGRAPHY STANDARD PKCS#6 EXTENDED-CERTIFICATE SYNTAX STANDARD PKCS#7 CRYPTOGRAPHIC MESSAGE SYNTAX STANDARD PKCS#8 PRIVATE-KEY INFORMATION SYNTAX STANDARD PKCS#9 SELECTED ATTRIBUTE TYPES PKCS#10 CERTIFICATION REQUEST SYNTAX STANDARD PKCS#11 CRYPTOGRAPHIC TOKEN INTERFACE STANDARD PKCS#12 PERSONAL INFORMATION EXCHANGE SYNTAX STANDARD PKCS#13 ELLIPTIC CURVE CRYPTOGRAPHY STANDARD PKCS#14 Pseudorandom number generator PKCS15# CRYPTOGRAPHIC TOKEN INFORMATION FORMAT STANDARD
Views: 1057 Zariga Tongy
PKCS
 
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In cryptography, PKCS is a group of public-key cryptography standards devised and published by RSA Security Inc, starting in the early 1990s. The company published the standards to promote the use of the cryptography techniques to which they had patents, such as the RSA algorithm, the Schnorr signature algorithm and several others. Though not industry standards (because the company retained control over them), some of the standards in recent years have begun to move into the "standards-track" processes of relevant standards organizations such as the IETF and the PKIX working-group. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 1706 Audiopedia
Padding (cryptography)
 
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In cryptography, padding refers to a number of distinct practices. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 1526 Audiopedia
Cryptography RSA in practice (Public Key Encryption from trapdoor permutations)
 
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RSA in practice 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: 90 intrigano
What is a PKCS
 
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What is a PKCS - Find out more explanation for : 'What is a PKCS' only from this channel. Information Source: google
Views: 44 WikiAudio7
11   4   PKCS 1 23 min
 
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Views: 95 Fco Gomes
Public Key Cryptography (CSS441, L13, Y15)
 
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Concepts of public key cryptography. Course material via: http://sandilands.info/sgordon/teaching
Views: 483 Steven Gordon
What is a pkcs7 certificate
 
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What is a pkcs7 certificate - Find out more explanation for : 'What is a pkcs7 certificate' only from this channel. Information Source: google
Views: 42 moibrad3b
On the Security of TLS 1/3 and QUIC Against Weaknesses in PKCS#1 v 1.5 Encryption: Dr. Tibor Jager
 
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On the Security of TLS 1/3 and QUIC Against Weaknesses in PKCS#1 v 1.5 Encryption, a lecture given by Dr. Tibor Jager, of Ruhr University Bochum, during The 1st Bar-Ilan University Security Day, titled "The Current Status of TLS Security", held at BIU in May 2016 by BIU's Center for Research in Applied Cryptography and Cyber Security. Bar-Ilan Univesrity: www.biu.ac.il/en BIU's Department of Computer Science: http://cs.biu.ac.il//en
Views: 138 barilanuniversity
Digital Signing and Verification using CSharp
 
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This tutorial demonstrates digital signing and verification using the Bouncy Castle APIs in C#.
Views: 14722 PKIIndia
Identity Based Encryption from the Diffie Hellman Assumption
 
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Paper by Nico Döttling and Sanjam Garg, presented at Crypto 2017. See https://iacr.org/cryptodb/data/paper.php?pubkey=28232
Views: 1644 TheIACR
OAEP
 
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Views: 108 Lu Ribeiro
Cryptography Constructions (Public Key Encryption from trapdoor permutations)
 
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Constructions (Public Key Encryption from trapdoor permutations) 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: 89 intrigano
Encryption with padding tutorial
 
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The tutorial is here: https://asecuritysite.com/02_05_padding.pdf
Views: 1024 Bill Buchanan OBE
RSA Signature - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1282 Udacity
Applied Cryptography: The RSA Digital Signature - Part 3
 
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This video covers some of the attacks on the schoolbook RSA signature scheme
Views: 1225 Leandro Junes
RSA-OAEP without Random Oracles, Featuring Eminem
 
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Presentation by Nairen Cao, Adam O'Neill, Mohammad Zaheri at Crypto 2018 Rump Session.
Views: 117 TheIACR
Padding - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 3643 Udacity
X-RSA
 
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- X-RSA contains a many of attack types such as Hasted, Fermat, Common Modulus, Chinese Remainder Theorem, Wiener ... etc , and it's still under development and adding other Attack. - X-RSA helps you in [CTF, Hacking , Penetration Testing , Decryption] - Written By [Python] - Download : https://github.com/X-Vector/X-RSA
Views: 177 X-Vector Channel
Hashing Encryption Decryption Digital Signature Signing Verification Openssl Pkcs7
 
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Reach me at linked in: www.linkedin.com/in/sameer-pasha-7aba6393 This video briefs on encryption, decryption and generating as well as verifying digital signatures. ============= NOTE: Replace GREATER-ARROW with angle-bracket below, as angle-brackets are not allowed in description. Commands used: Generate hash: md5sum Plaintext.txt gcc hash_func.c -lcrypto Encrypt a file: openssl enc -aes-128-cbc -in Plaintext.txt -K ABCDEF12345 -iv ABCDEF GREATER-ARROW Cipher.txt Decrypt a file: openssl enc -d -aes-128-cbc -in Cipher.txt -K ABCDEF12345 -iv ABCDEF Generate a detached signature: openssl smime -binary -sign -in Plaintext.txt -signer PK.crt -inkey PK.key -outform pem -out file.p7b Dump signature contents: openssl asn1parse -in file.p7b -dump -i ==== Generating digital-signature: sha1sum Plaintext.txt | cut -d ' ' -f 1 GREATER-ARROW hash openssl enc -aes-128-cbc -in hash -K ABCDEF12345 -iv ABCDEF GREATER-ARROW Signature.bin Verifying digital-signature: sha1sum Plaintext.txt | cut -d ' ' -f 1 GREATER-ARROW hash_1 openssl enc -d -aes-128-cbc -in Signature.bin -K ABCDEF12345 -iv ABCDEF GREATER-ARROW hash_2 cat hash_1 cat hash_2
Views: 2161 Sameer Pasha
Cryptographic Key Management APIs - Graham Steel
 
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Most developers use cryptography via an application program interface (API) either to a software library or a hardware device where keys are stored and all cryptographic operations take place. Designing such interfaces so that they offer flexible functionality but cannot be abused to reveal keys or secrets has proved to be extremely difficult, with a number of published vulnerabilities in widely-used crypto APIs appearing over the last decade. This lecture will focus on the example of RSA PKCS#11, the most widely used interface for cryptographic devices, but will allow us to develop principles and concepts that apply to most crypto APIs. We will demonstrate a tool, Tookan, which can reverse engineer the particular configuration of PKCS#11 in use on some device under test, construct a model of the device's functionality, and call a model checker to search for attacks. If an attack is found, it can be executed automatically on the device. We will also look at attacks related to the implementation of cryptography. This lecture follows naturally from the general introduction to security APIs, but is independent in the sense that it is disjoint and self-contained. Learning objectives basic design of cryptographic APIs logical flaws in key management cryptographic flaws in implementations The lecture was delivered at SecAppDev 2013 in Leuven, Belgium, by Graham Steel. Graham Steel holds a masters in mathematics from the University of Cambridge and a PhD in informatics from the University of Edinburgh. He is currently a researcher at INRIA, the French national agency for computer science research, where he is part of the Prosecco project team based in central Paris. Steel's main research interests are in formal analysis of information security and applied cryptography. His current work on cryptographic API verification involves using formal techniques to construct and analyse abstract models of cryptographic device interfaces. In addition to international conference and journal publications, his recent results have featured in Wired magazine and the New York Times. He has taught courses on security APIs at Tsinghua University (Beijing) and the University of Venice (Italy) as well as organising a Dagstuhl seminar on the subject.
Views: 5132 secappdev.org
RuhrSec 2017: "0-RTT Key Exchange with Full Forward Secrecy", Prof. Dr. Tibor Jager
 
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Reducing latency overhead while maintaining critical security guar- antees like forward secrecy has become a major design goal for key exchange (KE) protocols, both in academia and industry. Of particular interest in this re- gard are 0-RTT protocols, a class of KE protocols which allow a client to send cryptographically protected payload in zero round-trip time (0-RTT) along with the very first KE protocol message, thereby minimizing latency. Prominent ex- amples are Google’s QUIC protocol and the upcoming TLS protocol version 1.3. Intrinsically, the main challenge in a 0-RTT key exchange is to achieve forward secrecy and security against replay attacks for the very first payload message sent in the protocol. According to cryptographic folklore, it is impossible to achieve forward secrecy for this message, because the session key used to protect it must depend on a non-ephemeral secret of the receiver. If this secret is later leaked to an attacker, it should intuitively be possible for the attacker to compute the session key by performing the same computations as the receiver in the actual session. We show that this belief is actually false. We construct the first 0-RTT key exchange protocol which provides full forward secrecy for all trans- mitted payload messages and is automatically resilient to replay attacks. In our construction we leverage a puncturable key encapsulation scheme which permits each ciphertext to only be decrypted once. Fundamentally, this is achieved by evolving the secret key after each decryption operation, but without modifying the corresponding public key or relying on shared state. Our construction can be seen as an application of the puncturable encryption idea of Green and Miers (S&P 2015). We provide a new generic and standard- model construction of this tool that can be instantiated with any selectively secure hierarchical identity-based key encapsulation scheme.
Views: 352 Hackmanit GmbH
OAEP 2016
 
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Views: 70 gailmalabs
Padding Solution - Applied Cryptography
 
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This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
Views: 1492 Udacity
Kryptographie #38 - RSA ES OAEP
 
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In diesem Tutorial geht es um den aktuellen Standard des RSA-Verfahrens: RSA ES OAEP. Buchempfehlung: Introduction to Modern Cryptography von Katz und Lindell: http://amzn.to/2qu6CNb ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
#01 - RSA
 
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hedhi el vidéo el loula elli ta7ki 3ala akther crypto système mosta3mel elli houwa el RSA *************************************************** PKCS#1 : https://goo.gl/B9hee8 Nombres Premiers : https://goo.gl/inOkVO Indicatrice d'Euler : https://goo.gl/uxQz4l nombres de fermat : https://goo.gl/YQcrS8 *************************************************** Music: Ether - Silent Partner : https://www.youtube.com/watch?v=r6En29azNBA Buddha - Kontekst : https://www.youtube.com/watch?v=b6jK2t3lcRs Cold Funk - Funkorama : https://www.youtube.com/watch?v=Vhd6Kc4TZls *************************************************** Facebook : https://www.facebook.com/crypto.meftah.tn/
Views: 384 Meftah
What is PLAINTEXT-AWARE ENCRYPTION? What does PLAINTEXT-AWARE ENCRYPTION mean?
 
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What is PLAINTEXT-AWARE ENCRYPTION? What does PLAINTEXT-AWARE ENCRYPTION mean? PLAINTEXT-AWARE ENCRYPTION meaning - PLAINTEXT-AWARE ENCRYPTION definition - PLAINTEXT-AWARE ENCRYPTION explanation. 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 Plaintext-awareness is a notion of security for public-key encryption. A cryptosystem is plaintext-aware if it is difficult for any efficient algorithm to come up with a valid ciphertext without being aware of the corresponding plaintext. From a lay point of view, this is a strange property. Normally, a ciphertext is computed by encrypting a plaintext. If a ciphertext is created this way, its creator would be aware, in some sense, of the plaintext. However, many cryptosystems are not plaintext-aware. As an example, consider the RSA cryptosystem without padding. In the RSA cryptosystem, plaintexts and ciphertexts are both values modulo N (the modulus). Therefore, RSA is not plaintext aware: one way of generating a ciphertext without knowing the plaintext is to simply choose a random number modulo N. In fact, plaintext-awareness is a very strong property. Any cryptosystem that is semantically secure and is plaintext-aware is actually secure against a chosen-ciphertext attack, since any adversary that chooses ciphertexts would already know the plaintexts associated with them. The concept of plaintext-aware encryption was developed by Mihir Bellare and Phillip Rogaway in their paper on optimal asymmetric encryption, as a method to prove that a cryptosystem is chosen-ciphertext secure. Limited research on plaintext-aware encryption has been done since Bellare and Rogaway's paper. Although several papers have applied the plaintext-aware technique in proving encryption schemes are chosen-ciphertext secure, only three papers revisit the concept of plaintext-aware encryption itself, both focussed on the definition given by Bellare and Rogaway that inherently require random oracles. Plaintext-aware encryption is known to exist when a public-key infrastructure is assumed. Also, it has been shown that weaker forms of plaintext-awareness exist under the knowledge of exponent assumption, a non-standard assumption about Diffie-Hellman triples. Finally a variant of the Cramer Shoup encryption scheme was shown to be fully plaintext aware in the standard model under the knowledge of exponent assumption.
Views: 47 The Audiopedia
USENIX Security '18 - Return Of Bleichenbacher’s Oracle Threat (ROBOT)
 
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Hanno Böck, unaffiliated Abstract: In 1998 Bleichenbacher presented an adaptive chosen-ciphertext attack on the RSA PKCS~#1~v1.5 padding scheme. The attack exploits the availability of a server which responds with different messages based on the ciphertext validity. This server is used as an oracle and allows the attacker to decrypt RSA ciphertexts. Given the importance of this attack, countermeasures were defined in TLS and other cryptographic standards using RSA PKCS~#1~v1.5. We perform the first large-scale evaluation of Bleichenbacher's RSA vulnerability. We show that this vulnerability is still very prevalent in the Internet and affected almost a third of the top 100 domains in the Alexa Top 1 Million list, including Facebook and Paypal. We identified vulnerable products from nine different vendors and open source projects, among them F5, Citrix, Radware, Palo Alto Networks, IBM, and Cisco. These implementations provide novel side-channels for constructing Bleichenbacher oracles: TCP resets, TCP timeouts, or duplicated alert messages. In order to prove the importance of this attack, we have demonstrated practical exploitation by signing a message with the private key of \texttt{facebook.com}'s HTTPS certificate. Finally, we discuss countermeasures against Bleichenbacher attacks in TLS and recommend to deprecate the RSA encryption key exchange in TLS and the RSA PKCS~#1~v1.5 standard. View the full USENIX Security '18 program at https://www.usenix.org/usenixsecurity18/technical-sessions
Views: 242 USENIX
PKCS- Fin du destin
 
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Pkcs - fin du destin Un son un peu différents que d'habitude voilà.
Views: 62 Pkcs
Google Chrome pkcs11.txt File Planting PoC
 
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Read more about this at http://blog.acrossecurity.com/2011/10/google-chrome-pkcs11txt-file-planting.html Find this online PoC at http://www.binaryplanting.com/demo/chrome_pkcs11Planting/
Views: 2959 acrossecurity
Kryptographie #36 - RSA Verschlüsselung aus dem Lehrbuch
 
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Heute widmen wir uns endlich der RSA-Verschlüsselung. Buchempfehlung: Introduction to Modern Cryptography von Katz und Lindell: http://amzn.to/2qu6CNb ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
Kryptographie #4 - Grundkonzept von Verschlüsselungen
 
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In diesem Tutorial zeige ich euch die Grundkonzepte der Verschlüsselungsalgorithmen, die sich immer wieder wiederholen. Buchempfehlung: Introduction to Modern Cryptography von Katz und Lindell: http://amzn.to/2qu6CNb ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
What is PKCS 5
 
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What is PKCS 5 - Find out more explanation for : 'What is PKCS 5' only from this channel. Information Source: google
Views: 22 datunakai1b
Key Store Near Me Stafford Va Call 540-266-3144
 
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Cinderella: Turning Shabby X.509 Certificates into Elegant Anonymous Credentials with ...
 
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Cinderella: Turning Shabby X.509 Certificates into Elegant Anonymous Credentials with the Magic of Verifiable Computation Antoine Delignat-Lavaud (Microsoft Research) Presented at the 2016 IEEE Symposium on Security & Privacy May 23–25, 2016 San Jose, CA http://www.ieee-security.org/TC/SP2016/ ABSTRACT Despite advances in security engineering, authentication in applications such as email and the Web still primarily relies on the X.509 public key infrastructure introduced in 1988. This PKI has many issues but is nearly impossible to replace. Leveraging recent progress in verifiable computation, we propose a novel use of existing X.509 certificates and infrastructure. Instead of receiving and validating chains of certificates, our applications receive and verify proofs of their knowledge, their validity, and their compliance with application policies. This yields smaller messages (by omitting certificates), stronger privacy (by hiding certificate contents), and stronger integrity (by embedding additional checks, e.g. for revocation). X.509 certificate validation is famously complex and error-prone, as it involves parsing ASN.1 data structures and interpreting them against diverse application policies. To manage this diversity, we propose a new format for writing application policies by composing X.509 templates, and we provide a template compiler that generates C code for validating certificates within a given policy. We then use the Geppetto cryptographic compiler to produce a zero-knowledge verifiable computation scheme for that policy. To optimize the resulting scheme, we develop new C libraries for RSA-PKCS#1 signatures and ASN.1 parsing, carefully tailored for cryptographic verifiability. We evaluate our approach by providing two real-world applications of verifiable computation: a drop-in replacement for certificates within TLS, and access control for the Helios voting protocol. For TLS, we support fine-grained validation policies, with revocation checking and selective disclosure of certificate contents, effectively turning X.509 certificates into anonymous credentials. For Helios, we obtain additional privacy and verifiability guarantees for voters equipped with X.509 certificates, such as those readily available from some national ID cards.
RuhrSec 2018: "The ROBOT Attack", Hanno Böck
 
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Abstract. 20 years ago Daniel Bleichenbacher discovered an attack against RSA as it was used in SSL and the padding mode PKCS #1 v1.5. Obviously such an old attack doesn't work any more today, because everyone has fixed it. Okay... That was a joke. It still works. With some minor modifications we were able to discover the ROBOT attack (Return Of Bleichenbachers Oracle Threat). It affected nine different vendors and we were able to sign a message with the private key from facebook.com. More info at https://robotattack.org/ and in the full paper at https://eprint.iacr.org/2017/1189 Biography. Hanno Böck is a freelance journalist and regularly covers IT security topics for Golem.de and other publications. He also writes the monthly Bulletproof TLS Newsletter. In 2014 he started the Fuzzing Project, an effort to improve the security of free software applications. This work is supported by the Linux Foundation's Core Infrastructure Initiative.
Views: 661 Hackmanit GmbH
Kryptographie #11 - Padding
 
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Hier sehen wir uns an. wie man Nachrichten auf dieselbe Länge bringen kann. Buchempfehlung: Introduction to Modern Cryptography von Katz und Lindell: http://amzn.to/2qu6CNb ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
Kryptographie #73 - Angriffe auf RSA Signaturen
 
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In diesem Tutorial schauen wir uns an, warum RSA-Signaturen auf keinen Fall EUF-CMA sicher sein können (sogar nicht einmal UUF-CMA und EUF-NMA). Buchempfehlung: Introduction to Modern Cryptography von Katz und Lindell: http://amzn.to/2qu6CNb ❤❤❤ Früherer Zugang zu Tutorials, Abstimmungen, Live-Events und Downloads ❤❤❤ ❤❤❤ https://www.patreon.com/user?u=5322110 ❤❤❤ ❤❤❤ Keinen Bock auf Patreon? ❤❤❤ ❤❤❤ https://www.paypal.me/TheMorpheus ❤❤❤ 🌍 Website 🌍 https://the-morpheus.de ¯\_(ツ)_/¯ Tritt der Community bei ¯\_(ツ)_/¯ ** https://discord.gg/BnYZ8XS ** ** https://www.reddit.com/r/TheMorpheusTuts/ ** ( ͡° ͜ʖ ͡°) Mehr News? Mehr Code? ℱ https://www.facebook.com/themorpheustutorials 🐦 https://twitter.com/TheMorpheusTuts 🐙 https://github.com/TheMorpheus407/Tutorials Du bestellst bei Amazon? Bestell über mich, kostet dich null und du hilfst mir »-(¯`·.·´¯)-» http://amzn.to/2slBSgH Videowünsche? 🎁 https://docs.google.com/spreadsheets/d/1YPv8fFJOMRyyhUggK8phrx01OoYXZEovwDLdU4D4nkk/edit#gid=0 Fragen? Feedback? Schreib mir! ✉ https://www.patreon.com/user?u=5322110 ✉ https://www.facebook.com/themorpheustutorials ✉ https://discord.gg/BnYZ8XS ✉ [email protected] oder schreib einfach ein Kommentar :)
Aloaha PKCS #7 Crypter with Smart Card
 
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Aloaha PKCS #7 Crypter with Smart Card
Views: 791 Aloaha Limited
Eve The Magician Cracks A Tunnel - Bleichenbacher's attack
 
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http://asecuritysite.com/encryption/c_c3
Views: 1225 Bill Buchanan OBE
How do I create a new key database type PKCS12 with extension .p12 using the iKeyman utility?
 
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Alain Del Valle of the WebSphere Security team covers how to create a new key database type PKCS12 with extension .p12 using the iKeyman utility. This video is part of a series: Part 1 - How do I create a new key database type PKCS12 with extension .p12 using the iKeyman utility? https://youtu.be/XBEtxouebeM Part 2 - How do I generate a certificate signing request (CSR) file using the iKeyman utility? https://youtu.be/4hzppGTgNns Part 3 - How do I receive a signed certificate from a certificate authority using the iKeyman utility? https://youtu.be/Wq1ftCAow9Y
Views: 653 IBM SupportTV
Asymmetric Encryption and Decryption using C#
 
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This tutorial explains how to write a program in C# for Asymmetric Encryption and Decryption, particularly using BouncyCastle API. To add BouncyCastle API, check out our previous video at: https://www.youtube.com/watch?v=4iPzIEXC7a8
Views: 1976 PKIIndia

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