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Security and Crypto Technologist


2d
awarded  Nice Question
Jul
24
revised Protocol composition
added reference
Jul
24
reviewed Approve suggested edit on Adding an IV to an AES implementation
Jul
24
asked Universal hashing techniques based on matrix multiplication
Jul
24
accepted How is this affine function a pair wise independent permutation?
Jul
24
comment How is this affine function a pair wise independent permutation?
oh ok got it ! i miss calculated the $2^n - 1 $ part for $F(B)$
Jul
23
comment How is this affine function a pair wise independent permutation?
isn't it the probability 1 / (( 2^n ) * (2^(n-1))) ?
Jul
22
reviewed Approve suggested edit on How do we operate IV+1?
Jul
18
comment Should we sign-then-encrypt, or encrypt-then-sign?
@D.W , There is possibility that an attacker could launch denial of service , if the message should be decrypted first in order to verify the signature. The attacker could simply pump in large amounts of garbage and make the decryptor deplete its resources, assuming the message is huge and signature is less in length.
Jul
11
reviewed Approve suggested edit on In RSA, why does $p$ have to be bigger than $q$ where $n=p \times q$?
Jul
9
awarded  Popular Question
Jul
8
revised How is this affine function a pair wise independent permutation?
added 7 characters in body
Jul
8
comment How is this affine function a pair wise independent permutation?
yes i have copied that from the paper, i have mentioned the same
Jul
8
revised How is this affine function a pair wise independent permutation?
added 66 characters in body; edited title
Jul
8
asked How is this affine function a pair wise independent permutation?
Jul
2
awarded  Favorite Question
Jul
2
awarded  Inquisitive
Jul
2
awarded  Curious
Jun
27
comment What is Attribute Based Encryption?
informally, intuitively, i believe a technique achieved by PKE could also be achieved by SKE. ABE may be lot cleanly achieved in PKE but should be possible in SKE too, imagine a master secret key split into key shares per attribute or something but i did not think through how ABE can be realized using SKE
Jun
27
reviewed Approve suggested edit on Public Key Cryptography: Diffie-Hellman Key Exchange