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Aug
13
answered Is it possible to subtract/multiply numbers using homomorphic encryption?
Aug
4
answered Convert old and busted password encryption to something sensible
Jun
18
answered Is it possible to cryptographically prove when was the last time a ciphertext was decrypted/encrypted?
May
24
answered Requiring a “supervisor” key pair and a “user” key pair to decrypt multiple-recipient messages
Apr
25
answered Using the output of a stream cipher, how to guarantee the integrity of 4 bytes of data?
Feb
11
answered Name for identical operations for encryption and decryption
Feb
3
answered Store hashed email and compare hash values
Jan
29
answered Cryptographic Symmetric Stream Cipher
Jan
24
answered Any efficient text-based steganographic schemes?
Dec
16
answered Contruct a protocol to determine if three secret keys are different, without revealing any of them?
Dec
6
answered How to prove membership of a list without disclosing the list members?
Dec
3
answered Is there any research on the problem of making a number more memorable to humans?
Dec
3
answered How to prove membership of a list without disclosing the list members?
Dec
2
answered How to prove membership of a list without disclosing the list members?
Nov
22
asked Should we sign-then-encrypt, or encrypt-then-sign?
Nov
2
answered Can you use the same key to provide a signature and a MAC?
Oct
16
answered Is there a public key semantically secure cryptosystem for which one can prove in zero knowledge the equivalence of two plaintexts?
Oct
11
answered One time pad key exchange
Oct
11
answered Avalanche noise RNG for one-time pad use
Aug
13
answered Cryptographic GUID?