Cryptography

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Awarded 7307 times.
How to crack sha256 used as streamcipher with known or guessable block
Awarded 1 hour ago
RSA not encrypting properly when e=d?
Awarded 2 hours ago
Differential cryptanalysis - how to extend the attack to rounds before the last?
Awarded 2 hours ago
Can a MITM during Diffie-Hellman key exchange manipulate both sides to generate symmetric secrets?
Awarded yesterday
Strauss-Shamir trick on EC multiplication by scalar
Awarded yesterday
Can cryptographic accelerators along with side channel attack be used for GPS spoofing?
Awarded 2 days ago
Alternative to CBC mode encryption?
Awarded May 14 at 18:56
Example of bad basis for lattices (worst-case for LLL)
Awarded May 14 at 7:35
Wrapping "stronger" keys with "weaker" ones?
Awarded May 13 at 16:36
Validating AES GCM authentication tag between two different implementations
Awarded May 13 at 10:32
Is PRF Xored (or multiplied) with a random number still a secure PRF?
Awarded May 13 at 8:42
Classical vs Quantum-Safe Algorithms and Protocols / Application Approach
Awarded May 11 at 14:26
Efficient Obfuscation or Encryption method with low memory usage
Awarded May 10 at 19:57
Why is a weakly secure MAC without verification queries not necessarily weakly secure in the presence of verification queries?
Awarded May 10 at 3:57
Curve448 - Can Ed448 key material be reused for X448?
Awarded May 9 at 9:40
What is an output symbol?
Awarded May 9 at 2:02
What's the meaning of asterisk and PPT in this paper?
Awarded May 8 at 19:18
Why does the von Neumann corrector only work when the input bits are independent of each other and same bias?
Awarded May 8 at 9:21
Close to hexa ciphers [closed]
Awarded May 5 at 7:05
Format preserving numbers within an offset range?
Awarded May 4 at 14:20
Using ElGamal instead of RSA in FDH
Awarded May 4 at 11:57
Lamport Diffie One-time Signature
Awarded May 3 at 16:32
Is Python's secrets module random enough for a raffle?
Awarded May 3 at 16:07
How less secure were those random bytes?
Awarded May 3 at 16:02
Provably fair card deck used by client and server
Awarded May 3 at 5:41
How does the KeyGen of Merkle's improvement of Lamport's OTS work?
Awarded May 2 at 13:27
ElGamal same private and random key attack
Awarded Apr 30 at 0:20
Offset Parameters in BLAKE2b
Awarded Apr 29 at 13:35
Digital signature forgery
Awarded Apr 29 at 3:20
Proving that RSA CCA is possible
Awarded Apr 28 at 14:40
Version rollback attack prevention in TLS 1.2?
Awarded Apr 27 at 5:31
Understanding the "rewinding argument"
Awarded Apr 26 at 16:25
How do I find an equivalent permutation of AES S-box which sends $0$ in $0$?
Awarded Apr 25 at 20:18
How lattices and LWE are connected?
Awarded Apr 25 at 11:42
Is there a way to modify an existing RSA key pair so that the functionality remains?
Awarded Apr 24 at 10:17
What does it mean if two files created by the same person shares the same SHA256 hash?
Awarded Apr 24 at 9:41
Is it theoretically possible to delegate public key generation?
Awarded Apr 23 at 14:15
Proof of Elapsed Time (PoET)
Awarded Apr 23 at 2:57
Clarification on nonce collision calculation
Awarded Apr 21 at 13:55
What's the deal with Belgian cryptographers? [closed]
Awarded Apr 21 at 2:27
ElGamal discrete logarithm method to send keys
Awarded Apr 20 at 15:25
Use of irreducible Goppa codes in McEliece scheme
Awarded Apr 20 at 12:41
Is the combination of X25519 ECDH and NTRU in OpenSSH 9.X secure against quantum attacks?
Awarded Apr 20 at 9:37
Functional Encrypton: multiplying an encrypted vector by huge known matrix through inner product encrypton?
Awarded Apr 19 at 23:17
Separate Messages Encryption
Awarded Apr 18 at 23:46
Why is r used in ECDSA signature while R in Schnorr signature?
Awarded Apr 18 at 3:18
What's the probability of cracking this cipher using partial information about the private key obtained from $k$ public keys?
Awarded Apr 17 at 21:57
1-out-of-2 OT, chosen 1-out-of-2 OT and Random 1-out-of-2 OT
Awarded Apr 16 at 23:42
More efficient way of iterative hashing
Awarded Apr 15 at 18:35
Practical sources of entropy on an Android device?
Awarded Apr 15 at 10:02
Computational indistinguishability of two LWE type samples
Awarded Apr 15 at 0:46
When can composition be viewed as a vector-valued query with differential privacy?
Awarded Apr 14 at 21:36
Would this hash based encryption algorithm work in theory?
Awarded Apr 14 at 6:30
Do attackers need to know what ciphers are being used when conducting ciphertext-only, known plaintext, chosen plaintext, and chosen ciphertext attack
Awarded Apr 13 at 15:35
Find multiplicative inverse in Galois field $2^8$ using extended Euclides algorithms
Awarded Apr 12 at 19:57
Are PKI PQC algorithms slower than their nonPQ counterparts? (e.g. NTRU vs RSA)
Awarded Apr 12 at 17:57
Can you really ignore number of quantum processing steps needed for Shor's algorithm?
Awarded Apr 12 at 14:02
RSA Signing - Existential forgery and message prefix question. It's a weird one
Awarded Apr 12 at 6:06
Linkable/Tracable Ring Signatures Simple Explanation
Awarded Apr 11 at 12:26
How can we prevent duplicate key attacks on digital signatures
Awarded Apr 9 at 21:01
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