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Mar
20
revised RC4 , Is it possible to find the key if we know the plaintext and ciphertext?
added 1615 characters in body
Mar
20
answered RC4 , Is it possible to find the key if we know the plaintext and ciphertext?
Mar
20
comment Determining nonce between unsynced systems
@BrentonGraefe: Because you don't encrypt it -- you send the unencrypted nonce along with the encrypted packet.
Mar
19
answered Determining nonce between unsynced systems
Mar
19
answered HMAC tag to verify the key (verification in the reverse direction)
Mar
19
reviewed Leave Open Deciphering text encrypted with a changing cipher
Mar
18
reviewed Satisfactory Generate secure password hashes without access to PBKDF2 or bcrypt
Mar
17
awarded  Reviewer
Mar
17
reviewed No Action Needed Weaknesses of truncated hash value
Mar
17
reviewed Close I was wondering if RSA is an homomorphic crypto system?
Mar
17
reviewed Leave Open Weaknesses of truncated hash value
Mar
16
reviewed No Action Needed Differential Fault Analysis of AES
Mar
16
comment CCA-attack is possible in RSA, but how the decryption key $d$ is known to anyone
@Aria: same thing -- they do not reveal the keys; they might reveal the text of an encrypted message.
Mar
16
answered CCA-attack is possible in RSA, but how the decryption key $d$ is known to anyone
Mar
16
reviewed Close How to check if a sequence is generated by a linear congruential generator?
Mar
15
comment Implementing modular reductions (n*n)
Are you attempting to implement Paillier? I assume that you need to implement (say) a 2048 bit $n$, and the chip is unable to perform modular reductions on 4096 bit numbers, correct?
Mar
15
comment Encryption with a known plaintext
You beat me to the punch; a Message Authentication Code (or MAC) is what you're looking for. An HMAC is a good choice (assuming you use a reasonable hash function) -- if you prefer to use a block cipher, CMAC is another fine choice.
Mar
15
reviewed No Action Needed Encryption with a known plaintext
Mar
14
reviewed Close Implementing modular reductions (n*n)
Mar
14
reviewed Close How do you break encryption on a message?