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How to determine the order of an elliptic curve group from its parameters?

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Meysam Ghahramani

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How does constant-time comparison work?

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fgrieu♦

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Stuck on a cryptanalytical research project

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Ilmari Karonen

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Computing p and q from private key

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poncho

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Why is Threefish not widely used?

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Maarten Bodewes♦

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Is it insecure to sign the value 0 with ElGamal?

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poncho

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Entropy when iterating cryptographic hash functions

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D.W.

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MAC using a modified CBC mode of operation

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fgrieu♦

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Specification of the Megamos crypto algorithm

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Ilmari Karonen

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Formula for the number of expected collisions

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poncho

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Encrypting a key with the same key, for instance using AES

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Hilder Vitor Lima Pereira

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Can Quantum Computers crack RSA and AES?

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DannyNiu

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What motivated the creation of RSA and ECDH?

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KeiOh

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What is the difference between RSASSA-PSS signing and RSA-PSS signing?

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Squeamish Ossifrage

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How long does it take to crack PBKDF2?

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fgrieu♦

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Is it true the longer the key length is the more secure the encryption?

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otus

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Why can't the commitment schemes have both information theoretic hiding and binding properties?

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Russell Pekala

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curve25519 weak points for contributory behaviour

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Samuel Neves

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Is there an intuitive explanation as to why only the private key can decrypt a message encrypted with the public key?

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minar

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How to generate random numbers within a range (0,n) from random bits?

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Neil_UK

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Is there a hash function that's more expensive for an attacker than for the server?

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fgrieu♦

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Understanding Feldman's VSS with a simple example

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D.W.

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What is a trapdoor permutation?

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D.W.

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ECIES vs. RSA + AES

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fgrieu♦

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CKM_RSA_PKCS vs CKM_RSA_X_509 mechanisms in PKCS#11

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Maarten Bodewes♦

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Shor algorithm and schnorr signature in ed25519

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Squeamish Ossifrage

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What are the drawbacks of "lightweight crypto"?

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Mark

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Which MAC scheme is quantum resistant?

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D.W.

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Can a homomorphic encryption scheme be made CCA2 Secure?

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DrLecter

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Kyber and Dilithium explained to primary school students?

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Meir Maor

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Should RSA primes $p$ and $q$ differ in length by "a few digits"?

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fgrieu♦

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Kyber and Dilithium explained to primary school students?

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Daniel S

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Fast cipher without needing hardware support (like ChaCha20) for disk encryption

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Taylor R Campbell

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Is CTR more secure than CBC?

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kelalaka

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Could a 6502 CPU safely compute a SHA-1 hash in a reasonable length of time?

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fgrieu♦

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Is choosing $1$ as a public exponent valid in RSA?

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fgrieu♦

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Does symmetric key cryptography usually include hash function?

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fgrieu♦

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Always set the IV to 0 randomized CBC

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Daniel S

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HMAC with public-private key

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Squeamish Ossifrage

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"128-bit security" or "128 bits of security"?

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Yaron

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Quantum Computing Used to Break RSA by "fixing" Schnorr's Recent Factorization Claim?

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Daniel S

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How many qubits can break NIST P-521 ECC?

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Daniel S

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Must RSA exponent and modulus be odd

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yyyyyyy

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Must RSA exponent and modulus be odd

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forest♦

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Anatomy of an RSA private key

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Maarten Bodewes♦

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Is there a 32 bit block cipher that is also a permutation over all 4bn elements?

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forest♦

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How secure is it to use password as AES key?

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Richie Frame

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why XOR is recommended/Used in every paper I read for encryption and decryption stream cipher?

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poncho

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How strong are Bitlocker recovery keys?

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fgrieu♦

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Which is stronger: Threefish 1024-bit, SHACAL-2 512-bit, or AES-256?

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SEJPM

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Poly1305-AES vs AES-GCM

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Squeamish Ossifrage

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Coordinates in Elliptic Curves used in cryptography

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fgrieu♦

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What is the algorithm used to encrypt Linux passwords?

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ilkkachu

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Entropy of a counter

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poncho

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Is Trivium still secure?

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b degnan

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Is Trivium still secure?

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kodlu

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Which cryptography technique does not increase the size of the plain data?

Awarded Dec 13, 2022 at 12:40

pg1989

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Examples of frauds discovered because someone tried to mimic a random sequence

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Geoffroy Couteau

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Examples of frauds discovered because someone tried to mimic a random sequence

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Paul Uszak

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Does the position of the salt improve its effectiveness when hashing?

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Thomas Pornin

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