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Feb
14
answered Anonymous Gravatar Problem
Feb
14
comment Factoring two RSA modulus with known $|p_1 - p_2| < \ell $
if $p_1=p_2$ you can simply compute the greatest-common-divisor of $N_1$ and $N_2$ to factor them.
Feb
13
comment Which characters to take into account when calculating unicity distance?
You can get much lower if you use dictionaries containing English words.
Feb
13
comment Malicious DH groups
AFAIK Miller-Rabin rejects non primes with probability of at least 3/4, so after 40 passes even maliciously constructed prime candidates should only pass with probabiility <$2^{-80}$.
Feb
12
comment Java RSA Padding: no libraries used
For signatures you could use full-domain-hash (FDH). For encryption you could use hybrid encryption based on RSA-KEM.
Feb
12
reviewed Leave Open Is the SILC protocol still used?
Feb
12
reviewed Looks OK Is the SILC protocol still used?
Feb
12
comment Analogue encryption algorithms
From the wikipedia article you linked, it sounds like the signal is digital, not analog.
Feb
12
comment Analogue encryption algorithms
Frequency hopping isn't really encryption. It's main purpose is not even confidentiality of the message content, but avoiding jamming (DoS attack) and might make it harder to find the position of the sender.
Feb
12
revised Is symmetric encryption no longer necessary?
edited title
Feb
12
revised Why does the recommended key size between symmetric and asymmetric encryption differ greatly?
edited title
Feb
11
comment AES encryption takes more time to decrypt than encrypt
Can you include a link to the library you're using?
Feb
11
reviewed Edit AES encryption takes more time to decrypt than encrypt
Feb
11
revised AES encryption takes more time to decrypt than encrypt
deleted 80 characters in body
Feb
11
comment Pseudorandom function library
I'd first use HMAC-SHA-2 to reduce the input to a fixed size key and then use that key in a stream cipher to obtain arbitrary length output.
Feb
11
reviewed Leave Open Attacking multi block MAC constructions
Feb
11
reviewed Reviewed Analogue encryption algorithms
Feb
11
revised Analogue encryption algorithms
deleted 43 characters in body
Feb
11
comment Attacking multi block MAC constructions
@xxx I have deleted my comment mentioning your original name. But please refrain from vandalizing the question or my answer. You asked the question and can't take it back.
Feb
11
comment AES encryption takes more time to decrypt than encrypt
You could use a mode that only requires encryption, such as CTR mode.