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What's the difference between H(m) $\oplus$ H(key) and H(m || key) in MAC construction?

hash authentication hmac provable-security xor

modified 2 hours ago kelalaka 34.1k

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104

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What is “blinding” with cryptographic hash functions?

hash blinding

modified 6 hours ago David Cary 4,968

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66

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Using date stamp down to milliseconds / ticks as a salt?

hash collision-resistance

modified Apr 13 at 22:11 Aman Grewal 863

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47

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How is an ADFS SAML token's digest value calculated?

hash sha-256

answered Apr 13 at 10:36 Sebastian Adamo 21

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How secure is SHA1? What are the chances of a real exploit?

hash collision-resistance sha-1

modified Apr 13 at 1:26 Peter Green 1,109

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Using a hash function as a random number generator

hash pseudo-random-generator sha-1 md5 probability

modified Apr 12 at 8:14 fgrieu♦ 111k

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Leighton-Micali Hash-Based Signature key sizes

hash post-quantum-cryptography key-size hash-signature

answered Apr 8 at 18:31 AndiCover 101

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Test the randomness of a random permutations, that was generated without Fisher-Yates?

hash randomness permutation pseudo-random-permutation statistical-test

modified Apr 5 at 11:14 camel-cdr 13

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Hash fibers of cryptographic hash functions

hash

asked Apr 4 at 20:05 Dominic van der Zypen 135

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Implementation of Leighton-Micali Hash-Based Signatures

hash post-quantum-cryptography

modified Apr 3 at 4:05 Community♦ 1

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244

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Is SHA-256 a bijective function?

hash sha-256

modified Apr 1 at 14:53 SEJPM♦ 42.7k

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Finding multiple smaller collisions equal work as finding a bigger collision?

hash collision-resistance 2nd-preimage-resistance

answered Apr 1 at 3:05 poncho 118k

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Is collision resistant hash enough for one-block counter mode?

hash collision-resistance one-time-pad pseudo-random-function chosen-plaintext-attack

modified Mar 31 at 15:08 vxek 413

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Exercise applying Leftover hash Lemma

hash entropy universal-hash

asked Mar 30 at 16:28 Fede 11

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