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Feb
21
answered Compared to GCM or XTS modes, how secure is H xor R1, E (R2, R1, Message) for confidentiality and integrity?
Feb
18
answered Proving that a function is not a OWF (One-way-function)
Feb
13
answered OTP sequence uniqueness
Feb
11
answered How can we sign a contract digitally between two parties?
Feb
8
answered One-time digital signatures
Feb
7
answered Generating Diffie-Hellman parameters efficiently
Feb
5
answered Practical (and secure) PRGs
Feb
4
answered Hill cipher, unknown letter value
Feb
4
answered Hill cipher is not perfectly secure
Feb
2
answered Homomorphic encryption for vector addition
Jan
31
answered Addition-only PHE in F#
Jan
29
answered Efficiently computing the neutral element in a ring isomorphic to Z/NZ?
Jan
29
answered Predicting Java's PRNG using partial output
Jan
10
answered Maximal-length LFSR with $n$ bits when the factorization of $2^n-1$ is unavailable?
Dec
30
answered A timestamping authority (digital notary)
Dec
28
answered What is 'Carry-forward verification' defense against MITM?
Dec
26
answered How to prove that a ciphertext is encrypting multiplication of two values?
Dec
26
answered Security Level Estimate when Cascading/Compositing Ciphers?
Dec
23
answered Can the passphrase of a PGP key be deduced from an old backup?
Dec
22
answered Can we ensure the security of a crypto-algorithm and -implementaton against acoustic cryptanalysis?