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Nov
13
answered Determine the Key given ciphertexts and plaintexts?
Nov
12
asked Is there a cryptographic hash function that can be performed with pencil and paper?
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