Cryptography

Help Center > Badges > Popular Question

 Popular Question
Question with 1,000 views. This badge can be awarded multiple times.
Awarded 4301 times.
Why SHA-256 (or any other) is too fast for passwords but “slow” for collisions to be found?
Awarded 3 hours ago
Theoretically, what if I were to change some magic numbers in, say, AES?
Awarded 4 hours ago
Do public/private pairs work both ways?
Awarded 23 hours ago
Does SRP reduce to DH key exchange when shared password is not secret?
Awarded yesterday
What Is The Weakest Possible Encryption Algorithm [closed]
Awarded yesterday
Decrypt all RSA ciphertexts if you can break 1% of them
Awarded 2 days ago
What does AES round reduce in attacks mean?
Awarded 2 days ago
Is RSA vulnerable to the padding oracle attack?
Awarded 2 days ago
Can an U2F public/private key-pair for signatures be used for encryption?
Awarded Dec 6 at 18:55
Why does a Hashing Function produce good Random Numbers if Input is random?
Awarded Dec 6 at 15:25
Who verifies the trust of certificate authorities?
Awarded Dec 6 at 1:00
Why we need to use a modulus in public cryptography?
Awarded Dec 5 at 5:10
What would be a really secure way to encrypt sensitive data on a web site
Awarded Dec 5 at 0:55
Double DES meet in the middle attack: number of candidate keys
Awarded Dec 4 at 20:40
Is this function a secure PRF?
Awarded Dec 4 at 20:25
Is CPU timing jitter a usable entropy source?
Awarded Dec 4 at 6:45
Choice of padding scheme to prevent CBC padding oracle attacks?
Awarded Dec 4 at 1:05
ElGamal encryption and signature using same keys
Awarded Dec 3 at 15:45
Use AES in CTR mode with pycrypto
Awarded Dec 3 at 0:50
Is there asymmetric encryption in SSH?
Awarded Dec 2 at 19:55
Does secp256k1 have any known weaknesses?
Awarded Dec 2 at 8:00
DUKPT PIN decryption
Awarded Nov 30 at 16:40
Is every pseudorandom generator a one way function?
Awarded Nov 29 at 22:00
When would I need DSA as opposed to RSA for digital signature?
Awarded Nov 29 at 21:20
Do recent announcements about solving the DLP in $GF(2^{6120})$ apply to schemes proposed for cryptographic use?
Awarded Nov 29 at 20:15
Are there parts of a SHA-512 hash that occur more often then others?
Awarded Nov 29 at 16:45
Simulation Based Proof: What Can / Can not Simulator Do?
Awarded Nov 29 at 13:25
How does Python's pycrypto library generate primes?
Awarded Nov 29 at 3:20
What's a good P to use in ElGamal key generation?
Awarded Nov 28 at 20:25
How is public key cryptography used for digital signature?
Awarded Nov 28 at 15:50
How to find output sequence for LFSR from its polynomial? [duplicate]
Awarded Nov 26 at 21:35
How do you find the preimage of a hash?
Awarded Nov 26 at 13:25
Is reusing keys for CBC and CBC-MAC secure when using encrypt-then-MAC?
Awarded Nov 26 at 13:20
converting to rank one constraint system
Awarded Nov 26 at 13:10
Factoring a 512-bit number?
Awarded Nov 26 at 7:15
What does “seed” mean in cryptography?
Awarded Nov 26 at 3:55
Why is the Lovász condition used in the LLL algorithm?
Awarded Nov 25 at 17:55
Does changing the order of the steps within a round affect the security of AES?
Awarded Nov 25 at 10:40
ASN.1 encoding off RSASSA-PSS default parameters
Awarded Nov 25 at 7:35
How to do a frequency analysis?
Awarded Nov 25 at 5:50
When making public key fingerprints - is a sha1 hash still a good idea?
Awarded Nov 24 at 6:40
Security of Keccak/SHA3 against birthday attacks
Awarded Nov 23 at 22:05
Raw curve25519 public key points
Awarded Nov 23 at 7:10
HMAC-SHA256 for hashing of credit card PANs?
Awarded Nov 23 at 7:10
Main purpose for Carmichael's Function in RSA
Awarded Nov 22 at 22:00
How does RSA compute such enormous numbers?
Awarded Nov 22 at 20:45
Why the AES perform encryption in 10 rounds Instead of one?
Awarded Nov 22 at 18:35
RSA attack with continued fractions (Wieners attack)
Awarded Nov 22 at 14:20
Suppose I capture encrypted data that I want to decrypt. Could I use a server farm to decrypt?
Awarded Nov 22 at 11:50
Forgery attack for Merkle–Damgård MAC scheme with prefix method
Awarded Nov 22 at 11:05
SHA-256 support for SecretKeyFactory in Java 6 and 7?
Awarded Nov 21 at 18:10
Could a larger block size increase the security of the block cipher?
Awarded Nov 21 at 2:40
Basic Encryption and Decryption related question
Awarded Nov 21 at 1:25
Elliptic curve ed25519 vs ed448 - Differences
Awarded Nov 21 at 0:15
GoofyCoin question — why pk, why not sk?
Awarded Nov 20 at 14:55
How to Find the Generators of an Elliptic Curve
Awarded Nov 20 at 13:00
Can a raw ECDH shared secret be used directly for encryption?
Awarded Nov 19 at 17:10
How to use CRT to compute 4 square roots while decryption in Rabin Cryptosystem
Awarded Nov 19 at 12:40
CBC-MAC insecure with random IV
Awarded Nov 18 at 18:05
VKO GOST R 34.10-2001 (described in RFC4357), Key Agreement Algorithm. Looking for its implementation/detailed description/examples
Awarded Nov 18 at 10:50
1 2 3 4 5 … 72