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May
8
revised On modeling a random oracle hash function which maps $\mathbb{G}_1 \rightarrow \mathbb{G}_2$
added 4 characters in body
May
8
answered On modeling a random oracle hash function which maps $\mathbb{G}_1 \rightarrow \mathbb{G}_2$
May
8
awarded  Custodian
May
8
reviewed No Action Needed Size of p in ElGamal cryptosystem?
May
8
reviewed Leave Open Cryptodefense ransom use RSA-2048. Any chance with known plaintext attack?
May
8
revised Building cryptographic primitives using additive maps?
Gave it a tag
May
5
revised About the Rijndael/AES sbox polynomial (subBytes)
edited body
May
5
revised About the Rijndael/AES sbox polynomial (subBytes)
Actually computed the representation mapping
May
5
answered About the Rijndael/AES sbox polynomial (subBytes)
May
3
comment find $x$, given $\{c_ix = k_i + y_i\}_{i=[1,n]} $
@Subhayan: that's another way of putting it; however, that's less precise, because even though you have only $n$ equations, in theory it could be that all solutions to those equations might share the same $x$ value -- as I show, that doesn't happen here.
May
2
answered find $x$, given $\{c_ix = k_i + y_i\}_{i=[1,n]} $
May
2
comment find $x$, given $\{c_ix = k_i + y_i\}_{i=[1,n]} $
You say you are working in the group $\mathbb{Z}_p^*$, but then you perform both the addition and the multiplication operation; groups only have one operator. Do you really mean that you are working within the field $GF(p)$? Or, do you mean only the nonzero elements of $Z/p$ (and so the addition operation is not formally closed)? I'm asking because I wrote up an answer, and before I posted it, I realized that it depended on what structure you're in.
May
2
answered Understanding hash entropy
May
2
answered Analyzing ECB's and CBC's resistence to a known-plaintext attack
Apr
30
reviewed Close Spurious keys filter
Apr
30
awarded  Custodian
Apr
30
reviewed Close How do you test the security of your cipher?
Apr
30
answered Diffie Hellman Key Exchange (Finding # of bits/digits of secret key)
Apr
27
reviewed Approve suggested edit on kbkdf tag wiki excerpt
Apr
27
reviewed Approve suggested edit on kbkdf tag wiki