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Cryptography

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Awarded 758 times.
Should we MAC-then-encrypt or encrypt-then-MAC?
Awarded Sep 13, 2017 at 13:18
Is there a standard for OpenSSL-interoperable AES encryption?
Awarded Sep 2, 2017 at 12:36
Does the SHA hash function always generate a fixed length hash?
Awarded Aug 29, 2017 at 8:17
If I am about to generate one-time pad, where should I generate my pads from?
Awarded Aug 22, 2017 at 18:49
Guarding against cryptanalytic breakthroughs: combining multiple hash functions
Awarded Aug 18, 2017 at 7:56
How to fairly select a random number for a game without trusting a third party?
Awarded Aug 15, 2017 at 23:57
Should I use ECB or CBC encryption mode for my block cipher?
Awarded Aug 2, 2017 at 4:40
Would it be secure to use random numbers from random.org in a cryptographic solution?
Awarded Jul 31, 2017 at 18:11
Is H(k||length||x) a secure MAC construction?
Awarded Jul 27, 2017 at 14:25
When to use /dev/random over /dev/urandom in Linux
Awarded Jul 21, 2017 at 16:03
Creating a small number from a random octet string
Awarded Jul 20, 2017 at 15:42
Can someone explain the ECB Penguin?
Awarded Jul 15, 2017 at 18:51
Counter Mode: static IV but different keys [duplicate]
Awarded Jul 6, 2017 at 8:47
Why do we use encrypt-decrypt-encrypt (EDE) in 3DES, rather than encrypting three times?
Awarded Jul 4, 2017 at 20:17
Fixed point of the SHA-256 compression function
Awarded Jun 24, 2017 at 13:56
What is the difference between PKCS#5 padding and PKCS#7 padding
Awarded Jun 19, 2017 at 2:44
How to do a literature search
Awarded Jun 15, 2017 at 15:25
Impacts of not using RSA exponent of 65537
Awarded Jun 6, 2017 at 15:16
Does the Balloon hashing paper deprecate Argon2?
Awarded Jun 5, 2017 at 1:54
What are the practical differences between 256-bit, 192-bit, and 128-bit AES encryption?
Awarded May 30, 2017 at 6:31
Compressing EC private keys
Awarded May 24, 2017 at 14:42
Encrypting small values with RSA private key
Awarded May 8, 2017 at 6:34
From hash to Cryptographic hash
Awarded May 3, 2017 at 19:14
RSA: Is it secure to use the private key to encrypt and the public key to decrypt?
Awarded Apr 28, 2017 at 14:07
Is RSA encryption with a private key the same as signature generation?
Awarded Apr 26, 2017 at 20:59
Is AES really used for Top Secret stuff?
Awarded Apr 13, 2017 at 22:26
Why hash the message before signing it with RSA?
Awarded Mar 31, 2017 at 12:11
Is Diffie-Hellman mathematically the same as RSA?
Awarded Jan 25, 2017 at 8:53
What is the purpose of using different hash functions for the leaves and internals of a hash tree?
Awarded Jan 11, 2017 at 18:54
Why does Neumann think cryptography isn't the solution?
Awarded Jan 4, 2017 at 14:07
Why is public-key encryption so much less efficient than secret-key encryption?
Awarded Dec 27, 2016 at 22:50
Key Distribution vs Key Management?
Awarded Dec 26, 2016 at 5:41
Can I use PBKDF2 as a stream cipher?
Awarded Dec 26, 2016 at 3:05
Is password-based AES encryption secure at all?
Awarded Dec 26, 2016 at 1:41
Can we design a public-key infrastructure without certificate authorities?
Awarded Dec 24, 2016 at 2:31
Duration for attacking Two-Key Triple-DES Encryption using all RAM ever built?
Awarded Dec 18, 2016 at 20:29
What is the difference between a 'cipher' and a 'mode of operation'?
Awarded Dec 18, 2016 at 11:13
Dice rolls as entropy source?
Awarded Dec 16, 2016 at 13:57
How can data be encrypted in a client-server application so only clients can read it?
Awarded Dec 13, 2016 at 21:07
Why is it not possible to increase the size of RSA keys indefinitely?
Awarded Dec 13, 2016 at 16:46
Why are zk-SNARKs possible, in layman's terms
Awarded Nov 30, 2016 at 3:14
Why can't I reverse a hash to a possible input?
Awarded Nov 24, 2016 at 1:35
What is so special about elliptic curves?
Awarded Nov 13, 2016 at 15:58
How difficult is it to practically detect a forgery in a cryptosystem?
Awarded Nov 12, 2016 at 9:32
Is there an upper limit to plaintext size in XSalsa20Poly1305?
Awarded Oct 31, 2016 at 10:10
Truncated 60 bit SHA1 collision detection?
Awarded Oct 31, 2016 at 1:05
What does a "real" quantum computer need for cryptanalysis and/or cryptographic attack purposes?
Awarded Oct 23, 2016 at 10:44
Is the SHA1 hash of MD5 hash of a password secure?
Awarded Oct 2, 2016 at 19:38
If PGP and GPG both follow the OpenPGP standard, are they 100% compatible in all use cases?
Awarded Sep 20, 2016 at 19:27
Does any operating system offer full system encryption, including RAM and SWAP?
Awarded Sep 15, 2016 at 14:44
Memory-hard proof-of-work: are they ASIC-resistant?
Awarded Sep 6, 2016 at 2:23
How would you encrypt-then-MAC when using pen-and-paper and a Caesar cipher?
Awarded Sep 5, 2016 at 6:36
Can we exchange the permutation of a sponge construction?
Awarded Sep 4, 2016 at 18:58
Is there a signature scheme in which private keys can't be linked to their signatures?
Awarded Sep 2, 2016 at 1:09
Additive proof of discrete log?
Awarded Aug 31, 2016 at 4:03
Why is $H(k\mathbin\Vert x)$ not a secure MAC construction?
Awarded Jul 29, 2016 at 23:04
How do ciphers change plaintext into numeric digits for computing?
Awarded Jul 21, 2016 at 8:39
Why are cryptography algorithms not exported to certain countries?
Awarded Jul 16, 2016 at 17:08
How cryptographically secure was the original WW2 Enigma machine, from a modern viewpoint?
Awarded Jul 16, 2016 at 14:53
Are there encryption schemes with which it takes (significantly) longer to encrypt than to decrypt?
Awarded Jul 14, 2016 at 1:38
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