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Jul
6
revised Encryption scheme for social-network-like data sharing data via untrusted server?
edited tags
Jul
4
answered How can I validate a hashed password if all I have is another hash?
Jun
29
awarded  Organizer
Jun
29
revised Is there a known vulnerability when using identical key and salt with PBKDF2?
edited tags
Jun
29
comment Algorithm to securely exchange identities
@RickyDemer: After some thought, I now think you are right --each package only needs to go through each participant once.
Jun
29
answered Algorithm to securely exchange identities
Jun
22
answered Do I have to recompute all hashes if I change the work factor in bcrypt?
Jun
19
comment How to represent a 32-byte SHA2 hash in the shortest possible string?
@fgrieu: good point. Rather than the original base64, Geotarget probably wants RFC 4648 'base64url' "Base64 with URL and Filename Safe Alphabet". In order to guarantee that a program won't generate a base filename of "con" or some other reserved filename, and to make human-generated filenames such as "readme" usually sort before program-generated filenames, I typically make program-generated filenames start with lowercase 'z'.
Jun
13
answered Encryption vs. decryption of same plaintext
Jun
12
awarded  Editor
Jun
12
revised Looking for cipher that uses one ciphertext
link to related question/answer
Jun
12
answered Looking for cipher that uses one ciphertext
May
21
comment Software implementation of a commutative cipher?
possibly related: Algorithm Design for only Mutual Information Sharing
May
3
answered Software implementation of a commutative cipher?
May
3
comment Software implementation of a commutative cipher?
@IlmariKaronen: Yes, good point.
May
1
awarded  Student
May
1
answered Software implementation of a commutative cipher?
May
1
asked Has there been any cryptanalysis of RC4-52?
Nov
17
wiki created sha-1 description
Oct
17
comment What is the difference between a stream cipher and a one-time-pad?
Since the one-time-pad was actually used, it is not mythical. For example, the original Moscow–Washington hotline starting in 1967 used a one-time pad.