Cryptography
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alpominth
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All Questions Answers
Score Newest
question
2
When the input size in a PRF is larger than the output and many inputs will generate the same output, but why AES-256 in CTR mode is considered safe?
Mar 3
question
1
Why do the hash functions tested by SMhasher appear to be exceptionally fast?
Mar 10
question
1
How to estimate the collision resistance of a hash function if a secondary key is used (keyed hash function)?
Mar 17
question
1
Does an increase of message size increase the number of guesses to find a collision?
Mar 17
question
1
Is it safe or reasonable to use the key parameter in a cryptographic hash function as a counter?
Mar 18
question
1
In CTR block cipher mode of operation, can I reuse the nonce with another key for encrypting another plaintext if using different counters?
Mar 20
question
1
Why hashing a seed to generate a key and using chaining to get the rest of key matterial is not secure?
Mar 2
question
0
Hashing a seed full of entropy with a cryptographic hash function and emiting a key with the same size as input: can a collision attack occurs?
Mar 22
question
0
If I encrypt two plaintexts with different keys, XOR the ciphertexts and send to an adversary, what can he/she do with what I sent?
yesterday
question
0
Once a secure hash function built up a (fast) internal hash table, can data to be hashed be different from the data inserted when doing the lookups?
Mar 12

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