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visits member for 2 years, 9 months
seen 8 hours ago

Security and Crypto Technologist


9h
comment How is this affine function a pair wise independent permutation?
isn't it the probability 1 / (( 2^n ) * (2^(n-1))) ?
1d
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
16
comment Security Model of Group Key Transfer Protocols
which group key protocol ? provide more info . references etc. its too abstract
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
Jun
26
comment What is Attribute Based Encryption?
am curious if there is any work done in symmetric ABE schemes
Jun
23
reviewed Approve suggested edit on Modulo settings for successful encryption?
Jun
23
comment how to truncate a PRF on n bits to PRF on t bits where t < n?
@D.W even i was not clear by Boneh's comment that there are better ways to do it . so thought of checking with the community
Jun
21
reviewed Approve suggested edit on Cryptography: Oblivious Transfer with at most one transfer?
Jun
21
reviewed Approve suggested edit on how to truncate a PRF on n bits to PRF on t bits where t < n?