Cryptography

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Awarded 357 times.
How useful is NIST's Randomness Beacon for cryptographic use?
Awarded Nov 6 at 17:06
Developing algorithm for detecting plain text via frequency analysis
Awarded Oct 22 at 9:46
Low Public Exponent Attack for RSA
Awarded Oct 9 at 18:37
Is openssl rand command cryptographically secure?
Awarded Sep 27 at 18:33
How Brittle Are LCG-Cracking Techniques?
Awarded Sep 15 at 21:16
How many RSA keys before a collision?
Awarded Jul 21 at 17:32
Definition of "pepper" in hash functions
Awarded Jul 19 at 15:36
Should you change salt when changing password?
Awarded Jul 7 at 20:03
Proving knowledge of a preimage of a hash without disclosing it?
Awarded May 15 at 9:41
Why is SHA-3 robust against Length-Extension Attacks?
Awarded May 9 at 17:28
What is the ideal cipher model?
Awarded May 2 at 16:42
Can an AI really generate random numbers?
Awarded Apr 27 at 17:42
When to use Argon2i vs Argon2d vs Argon2id?
Awarded Apr 20 at 14:31
Is RSA encryption with a private key the same as signature generation?
Awarded Apr 9 at 22:06
Is sharing the modulus for multiple RSA key pairs secure?
Awarded Apr 4 at 23:31
Is there a hash function that's more expensive for an attacker than for the server?
Awarded Feb 23 at 18:41
What are the odds of collisions for a hash function with 256-bit output?
Awarded Feb 5 at 21:04
What is the difference between Scrypt and PBKDF2?
Awarded Jan 27 at 22:47
How does the MOV attack work?
Awarded Jan 2 at 10:46
What is the purpose of using different hash functions for the leaves and internals of a hash tree?
Awarded Dec 12, 2022 at 13:49
Is Encrypt+HMAC stronger than AEAD?
Awarded Dec 10, 2022 at 2:21
What's the purpose of key-rotation?
Awarded Dec 6, 2022 at 11:57
What differentiates a password hash from a cryptographic hash besides speed?
Awarded Dec 1, 2022 at 2:47
Attacks of the MAC construction $\mathcal{H}(m\mathbin\|k)$ for common hashes $\mathcal{H}$?
Awarded Nov 26, 2022 at 10:28
With sufficient randomness, is XOR an acceptable mechanism for encrypting?
Awarded Nov 26, 2022 at 1:10
What is a Pedersen commitment?
Awarded Nov 25, 2022 at 10:25
ElGamal with elliptic curves
Awarded Nov 24, 2022 at 14:42
Is AES-128 quantum safe?
Awarded Nov 16, 2022 at 19:21
Why do block ciphers need a non-linear component (like an S-box)?
Awarded Oct 30, 2022 at 2:08
Why are the lower 3 bits of curve25519/ed25519 secret keys cleared during creation?
Awarded Oct 26, 2022 at 9:49
What data is saved in RSA private key?
Awarded Sep 28, 2022 at 11:50
Key derivation functions (KDF): What are they, what are their main purposes and how they can be used?
Awarded Sep 27, 2022 at 8:26
How many KDF rounds for an SSH key?
Awarded Aug 24, 2022 at 15:35
How to determine the order of an elliptic curve group from its parameters?
Awarded Aug 17, 2022 at 3:15
Are there hash algorithms with variable length output?
Awarded Jul 23, 2022 at 20:46
Elliptic curve ed25519 vs ed448 - Differences
Awarded Jul 7, 2022 at 8:28
What do the signature security abbreviations like EUF-CMA mean?
Awarded May 3, 2022 at 11:55
How easy is it in 2022 to find a SHA1 collision?
Awarded Apr 25, 2022 at 0:57
What is hardened SHA-1, how does it work and how much protection does it offer?
Awarded Apr 23, 2022 at 11:42
Use cases for CMAC vs. HMAC?
Awarded Apr 18, 2022 at 9:12
Is there any famous protocol that were proven secure but whose proof was wrong and lead to real world attacks?
Awarded Apr 16, 2022 at 0:03
Which attacks are possible against raw/textbook RSA?
Awarded Apr 3, 2022 at 19:26
How robust is discrete logarithm in $GF(2^n)$?
Awarded Mar 24, 2022 at 11:47
Is a hash a zero-knowledge proof?
Awarded Mar 10, 2022 at 13:40
Have any cryptographic breaks been executed in the real world since World War II?
Awarded Feb 25, 2022 at 1:26
what is the difference between proofs and arguments of knowledge?
Awarded Feb 23, 2022 at 8:56
What is the length of an RSA signature?
Awarded Feb 23, 2022 at 8:56
The exact difference between a permutation and a substitution
Awarded Feb 16, 2022 at 12:50
Plain text size limits for AES-GCM mode just 64GB?
Awarded Feb 15, 2022 at 15:10
Why is SRP not widely used?
Awarded Jan 30, 2022 at 4:31
What is the difference between SHA-3 and SHA-256?
Awarded Jan 9, 2022 at 23:52
How does ECDH arrive on a shared secret?
Awarded Dec 2, 2021 at 14:08
Why is FIPS 140-2 compliance controversial?
Awarded Nov 24, 2021 at 16:37
Using the same RSA keypair to sign and encrypt
Awarded Nov 17, 2021 at 10:41
Largest integer factored by Shor's algorithm?
Awarded Nov 16, 2021 at 13:17
How to solve MixColumns
Awarded Oct 26, 2021 at 12:04
Why not authenticate full-disk encryption?
Awarded Oct 3, 2021 at 22:34
Is there a hash function which has no collisions?
Awarded Sep 22, 2021 at 17:03
What does "birational equivalence" mean in a cryptographic context?
Awarded Sep 6, 2021 at 21:15
Is 128-bit security still considered strong in 2020, within the context of both ECC Asym & Sym ciphers
Awarded Sep 2, 2021 at 15:05
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