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Jan
21
answered Asymmetric algorithm to generate compact unique messages that can be validated
Jan
21
answered Messages exchanged between Bob Alice are encrypted safe?
Jan
18
awarded  Informed
Jan
13
answered AES Algorithm processing time in Arduino vs Raspberry Pi
Jan
13
comment Convert old and busted password encryption to something sensible
related: Increase the security of an already stored password hash
Jan
12
comment Is there a simple hash function that one can compute without a computer?
related: crypto.stackexchange.com/questions/11691/…
Jan
7
awarded  Nice Answer
Jan
2
comment How does the secret key in an HMAC prevent modification of the HMAC?
@StephenTouset, by "appending data to the end", I think George is referring to a length extension attack, which is not trivial.
Dec
29
comment Salts, how does the script know what the salt is?
Yes, and often the name of the hash algorithm is also concatenated to the salt and the hash, in Modular Crypt Format or LDAP / RFC2307 format.
Dec
9
revised Alphabetic Substitution with Symbols
linkfix
Dec
3
awarded  Notable Question
Nov
25
revised Is the following symmetric design secure?
fix oops -- need a random permutation here, not a random function.
Nov
23
revised Is the following symmetric design secure?
rough draft of a proof
Nov
23
answered Is the following symmetric design secure?
Nov
19
awarded  Nice Question
Nov
13
awarded  Excavator
Nov
13
revised Attack XOR encryption of binary data compressed by zlib with known key length (very short key)
Is this what you really meant?
Nov
13
revised Determine the Key given ciphertexts and plaintexts?
forgot to update B0 and B1
Nov
13
answered Determine the Key given ciphertexts and plaintexts?
Nov
13
comment How can we get CA's public key?
@CodesInChaos: make that an answer.