28,931 reputation
12156
bio website
location
age
visits member for 2 years, 11 months
seen 3 hours ago

Jul
11
reviewed Leave Open Determining if a stream of bits is statistically random
Jul
10
comment Calculating IHVs from known message and hash output
@DmitryYanushkevich: no, there is not. In fact, the existence of a method that could solve it in, say, 2^150 steps, could be used to find preimages in 2^156 steps (for SHA-1).
Jul
10
answered Calculating IHVs from known message and hash output
Jul
10
reviewed No Action Needed How can a Vigenère cipher be broken if the message is short?
Jul
10
reviewed Close CBC-MAC length extension attack with IV simulation
Jul
9
comment Random Number Generator based on AES CTR
If you have anything that shows that CTR_DRBG is computationally distinguishable from a truly random source (given an unknown seed), I would strongly urge you to publish it. I am personally skeptical that you have any such evidence.
Jul
9
comment Random Number Generator based on AES CTR
Have you considered the CTR_DRBG from csrc.nist.gov/publications/nistpubs/800-90A/SP800-90A.pdf ; that's mostly your idea, with the details worked out
Jul
8
answered How is this affine function a pair wise independent permutation?
Jul
8
reviewed No Action Needed What exactly does a key do?
Jul
8
reviewed Leave Open How is the MD2 hash function S-table constructed from Pi?
Jul
7
reviewed Close Where can I begin to study the math behind modern cryptography?
Jul
7
reviewed Approve suggested edit on sha-2 tag wiki
Jul
6
comment Generate Finite Field power of g
Is the question "what is meant by the notation $g^x$"? Or, is the question "how do you do multiplication in the field $GF(16)$"?
Jul
6
reviewed No Action Needed Generate Finite Field power of g
Jul
6
reviewed No Action Needed Type 2 to Type 1 pairing transformation - why not considered?
Jul
5
comment Use ElGamal to solve Diffie-Hellman problem
@CGFoX: well, $z$ is from the ciphertext, and you get to pick that, so of course you can... (I almost mentioned that myself; I'm glad I didn't; it's better that you thought of it)
Jul
4
comment Use ElGamal to solve Diffie-Hellman problem
@CGFoX: stop at $(g^{xy})^{-1} \cdot z$; do you know the value $z$?
Jul
4
answered Cryptool - DES (ECB and CBC ) - double encyption
Jul
4
answered Use ElGamal to solve Diffie-Hellman problem
Jul
3
answered Algorithm for computing square roots in $GF(2^n)$