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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: 732 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: 3 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: 459536 Frame of Essence
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: 774 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: 1050 Zariga Tongy
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 :)
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: 1405 Audiopedia
Public Key Cryptography
 
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Full Video Details: http://www.securitytube.net/video/119
Views: 857 TheSecurityTube
Padding (cryptography)
 
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Video Software we use: https://amzn.to/2KpdCQF Ad-free videos. You can support us by purchasing something through our Amazon-Url, thanks :) In cryptography, padding refers to a number of distinct practices. This channel is dedicated to make Wikipedia, one of the biggest knowledge databases in the world available to people with limited vision. Article available under a Creative Commons license Image source in video
Views: 126 WikiWikiup
6.875 (Cryptography) L8: Trapdoor Functions
 
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MIT's Spring 2018 Cryptography & Cryptanalysis Class (6.875) Prof. Vinod Vaikuntanathan
Views: 52 Andrew Xia
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: 1579 Audiopedia
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: 3337 Udacity
Encryption with padding tutorial
 
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The tutorial is here: https://asecuritysite.com/02_05_padding.pdf
Views: 981 Bill Buchanan OBE
RSA Digital Signature: SIGN in Python pyCrypto & verify in JavaScript jsrsasign
 
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In most cases, we want to interact our python server (Flask/Django) with multiple clients over the web that uses JavaScript. This is a demonstration of how can you generate a signature in python and verity that signature in JavaScript and Vice Versa. jsrsasign library test console: https://kjur.github.io/jsrsasign/sample/sample-rsasign.html
Views: 2062 Anum Sheraz
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: 849 TheIACR
Padding in Ciphers
 
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https://asecuritysite.com/encryption/padding
Views: 1345 Bill Buchanan OBE
Cryptography Definitions and security (Public Key Encryption from trapdoor permutations)
 
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Cryptography Definitions and security (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: 81 intrigano
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.
openssl tutorial generate rsa,dsa  keys learn how to verify rsa,dsa keys
 
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How to Generate RSA,DSA keys using OpenSSL
Views: 7479 Zariga Tongy
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: 50 intrigano
On the Security of TLS 1.3 and QUIC Against Weakness in PKCS#1 v1.5 Encryption - Tibor Jager
 
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The 1st BIU Security Day- The Current Sratus of TLS Security which was held on April 28, 2016
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: 71 intrigano
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: 1876 Sameer Pasha
Eve The Magician Cracks A Tunnel - Bleichenbacher's attack
 
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http://asecuritysite.com/encryption/c_c3
Views: 1095 Bill Buchanan OBE
Symmetric key cryptography and asymmetric key cryptography
 
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symmetric key cryptography and asymmetric key cryptography
Views: 24 Last Night Study
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: 1734 PKIIndia
Cryptography The RSA trapdoor permutation
 
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The RSA trapdoor permutation 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: 166 intrigano
#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: 375 Meftah
Python code audit of a firmware update - 34C3 CTF software_update (crypto) part 1/2
 
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This challenge from the 34C3 CTF implemented a software update in python. In part 1/2 we try to understand the code and think about possible attacks. software_update: https://archive.aachen.ccc.de/34c3ctf.ccc.ac/challenges/index.html What is CTF? https://www.youtube.com/watch?v=8ev9ZX9J45A Why you should play CTFs: https://www.youtube.com/watch?v=rfjV8XukxO8 tools: python, telnet, nc, cat, pbcopy, openssl, factordb.com, sublime, pycrypto -------------------------------------- Twitter: https://twitter.com/LiveOverflow Website: http://liveoverflow.com/ Subreddit: https://www.reddit.com/r/LiveOverflow/ Facebook: https://www.facebook.com/LiveOverflow/
Views: 21951 LiveOverflow
What is a Trap door function
 
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A video submission to CSE 199 class.
Views: 1406 hoan duc
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 #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 :)
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: 17 USENIX
11   4   PKCS 1 23 min
 
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Views: 72 Fco Gomes
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: 76 USENIX
Aloaha PKCS #7 Crypter
 
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Encrypt and Decrypt any File with the Aloaha PKCS #7 Crypter
Views: 833 Aloaha Limited
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: 347 Hackmanit GmbH
Key Confirmation in Key Exchange: A Formal Treatment and Implications for TLS 1.3
 
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Key Confirmation in Key Exchange: A Formal Treatment and Implications for TLS 1.3 Felix Günther (Technische Universität Darmstadt) Presented at the 2016 IEEE Symposium on Security & Privacy May 23–25, 2016 San Jose, CA http://www.ieee-security.org/TC/SP2016/ ABSTRACT Key exchange protocols allow two parties at remote locations to compute a shared secret key. The common security notions for such protocols are secrecy and authenticity, but many widely deployed protocols and standards name another property, called key confirmation, as a major design goal. This property should guarantee that a party in the key exchange protocol is assured that another party also holds the shared key. Remarkably, while secrecy and authenticity definitions have been studied extensively, key confirmation has been treated rather informally so far. In this work, we provide the first rigorous formalization of key confirmation, leveraging the game-based security framework well-established for secrecy and authentication notions for key exchange. We define two flavors of key confirmation, full and almost-full key confirmation, taking into account the inevitable asymmetry of the roles of the parties with respect to the transmission of the final protocol message. These notions capture the strongest level of key confirmation reasonably expectable for the two communication partners of the key exchange. We demonstrate the benefits of having precise security definitions for key-confirmation by applying them to the next version of the Transport Layer Security (TLS) protocol, version 1.3, currently developed by the Internet Engineering Task Force (IETF). Our analysis shows that the full handshake as specified in the TLS 1.3 draft draft-ietf-tls-tls13-10 achieves desirable notions of key confirmation for both clients and servers. While key confirmation is generally understood and in the TLS 1.3 draft described as being obtained from the Finished messages exchanged, interestingly we can show that the full TLS 1.3 handshake provides key confirmation even without those messages, shedding a formal light on the security properties different handshake messages entail. We further demonstrate the usefulness of rigorous definition by revisiting a folklore approach to establish key confirmation (as discussed for example in SP 800-56A of NIST). We provide a formalization as a generic protocol transformation and show that the resulting protocols enjoy strong key confirmation guarantees, thus confirming its beneficial use in both theoretical and practical protocol designs.
What Is A PFX Certificate File?
 
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Pfx) files ssl what is the difference between. How to export an ssl certificate with private key (pfx) using mmc pfx filehow make a. 509 certificate or to may 13, 2014 crt and. The file is copied to the subdirectory on vcenter extended from, microsoft pfx format. Pfx file if one apr 1, 2014 a. Pfx file and how do i open it? . This will start the wizard select 'next' next panel specifies mar 12, 2015 q. Pfx files are typically used on windows machines to import and export certificates private keys apr 20, 2017 in this example, the certificate public key abc. Pfx password or why is my not working how to convert pfx certificate pem format for use with netscaler. The certificate authority (ca) the rui. Pfx file is a concatenation of the system's certificate and private key, exported in pfx format. Pfx includes both the public and private key for associated certificate (never share this outside your organization); It can be used feb 18, 2010 windows uses. Digicert provides your ssl certificate file jan 21, 2013 a. Personal information exchange (. How can i do this on windows? A. This post shows you how convert those file into their proper form. Key files cannot be used to install an ssl certificate. In cryptography, pkcs #12 defines an archive file format for storing many cryptography objects as a single. Certificates to different formatscertificate utility tls difference between. I have a certificate file in pfx format that i need to convert pem. Pem is required for a number of you can then download your certificate, install it in microsoft management console (mmc), and create pfx file. P12 certificate file using openssl ssl create a pfx p12 class "" url? Q webcache. Key files pfx file extension what is a. Pfx for a pkcs #12 file. P12 certificate in the command line using openssl may 26, 2017 windows servers use. How do i install import my certificate again if have saved it as a converting files in pfx format to pem. Htm url? Q webcache. Pfx file is a pkcs#12 archive bag which can contain lot of objects with optional password protection; But, usually, contains certificate (possibly its assorted set ca certificates) and the corresponding private key or pfx format binary for storing server certificate, any intermediate certificates, in one encryptable. The f option configures pvk2pfx to replace an existing. Pfx files that contain the public key file (ssl certificate file) and associated private. Certificates provide the foundation of a public key infrastructure (pki). Pfx files usually have extensions such as. Jun 19, 2015 the commands below demonstrate examples of how to create a. This file can contain a variety of cryptographic information,
Views: 709 Hadassah Hartman
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: 2924 acrossecurity
Hardware Security Mechanisms for Authentication and Trust
 
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Explore novel lightweight hardware-based mechanisms for ensuring security, intellectual property (IP) protection and trust of integrated circuits (ICs) and systems with Farinaz Koushanfar of Rice University. New security methods are in demand due to the proliferation of the fabless semiconductor business model, increase of third-party IP reuse, emergence of personal security devices and the high overhead of traditional cryptographic protocols for embedded systems. Active hardware metering is a first system of security mechanisms and protocols that enable the design house to gain active post-fabrication control of each produced IC, their properties and terms of use or by run-time disabling of ICs in case of tamper detection. Koushanfar also shares his ongoing work in security analysis, safeguarding, implementation and the fabrication of new families of physical unclonable functions, and their use in secure system design. He also discusses attacks and countermeasures.
Views: 7217 UWTV
Revisiting SSL/TLS implementations: new Bleichenbacher side channels and attacks
 
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usenix 2014 this video is not belong to me
Views: 597 Hailey Bang
Aloaha PKCS #7 Crypter with Smart Card
 
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Aloaha PKCS #7 Crypter with Smart Card
Views: 770 Aloaha Limited
GopherCon 2017: Filippo Valsorda - Encrypting the Internet with Go
 
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For a few months this year, a lot of your Internet requests might have gone through Go. That's because at Cloudflare we picked crypto/tls to build our TLS 1.3 implementation.
Views: 3760 Gopher Academy
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: 12 datunakai1b
Implementing and Proving the TLS 1.3 Record Layer
 
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Implementing and Proving the TLS 1.3 Record Layer Cédric Fournet (Microsoft Research) Presented at the 2017 IEEE Symposium on Security & Privacy May 22–24, 2017 San Jose, CA http://www.ieee-security.org/TC/SP2017/ ABSTRACT The record layer is the main bridge between TLS applications and internal sub-protocols. Its core functionality is an elaborate form of authenticated encryption: streams of messages for each sub-protocol (handshake, alert, and application data) are fragmented, multiplexed, and encrypted with optional padding to hide their lengths. Conversely, the subprotocols may provide fresh keys or signal stream termination to the record layer. Compared to prior versions, TLS 1.3 discards obsolete schemes in favor of a common construction for Authenticated Encryption with Associated Data (AEAD), instantiated with algorithms such as AES-GCM and ChaCha20-Polyl305. It differs from TLS 1.2 in its use of padding, associated data and nonces. It also encrypts the content-type used to multiplex between sub-protocols. New protocol features such as early application data (0-RTT and 0.5-RTT) and late handshake messages require additional keys and a more general model of stateful encryption. We build and verify a reference implementation of the TLS record layer and its cryptographic algorithms in F*, a dependency typed language where security and functional guarantees can be specified as pre- and post-conditions. We reduce the high-level security of the record layer to cryptographic assumptions on its ciphers. Each step in the reduction is verified by typing an F* module; for each step that involves a cryptographic assumption, this module precisely captures the corresponding game. We first verify the functional correctness and injectivity properties of our implementations of one-time MAC algorithms (Poly1305 and GHASH) and provide a generic proof of their security given these two properties. We show the security of a generic AEAD construction built from any secure one-time MAC and PRF. We extend AEAD, first to stream encryption, then to length-hiding, multiplexed encryption. Finally, we build a security model of the record layer against an adversary that controls the TLS sub-protocols. We compute concrete security bounds for the AES_128_GCM, AES_256_GCM, and CHACHA20_POLY1305 ciphersuites, and derive recommended limits on sent data before re-keying. We plug our implementation of the record layer into the miTLS library, confirm that they interoperate with Chrome and Firefox, and report initial performance results. Combining our functional correctness, security, and experimental results, we conclude that the new TLS record layer (as described in RFCs and cryptographic standards) is provably secure, and we provide its first verified implementation.
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: 22 WikiAudio7
DROWN - Breaking TLS using SSLv2: Nimrod Aviram
 
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DROWN: Breaking TLS using SSLv2, a lecture given by Nimrod Aviram 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: 260 barilanuniversity