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Jul
28
comment Signature and hash function properties
"collision resistance implies preimage resistance" only in the sense that second-preimage resistance also implies preimage resistance. $\;$
Jul
27
comment CPA-security of a pseudorandom permutation encryption scheme
You appear to be missing the "prove that this scheme is CPA-secure for ..." part. $\;$
Jul
26
comment Show How to Efficiently Solve the Computational Diffie-Hellman Assumption given an Algorithm that Solves the Square-DH Problem
cross-posted from MSE after less than 2 minutes, and answered there $\;$
Jul
26
comment Example: pre-image resistance to second pre-image resistance
You would need to make the same tests as for any arbitrary construction: crypto.stackexchange.com/q/183/991
Jul
26
comment Converting a pre-image resistant hash to second pre-image resistant
The only better description I can think of would be a summary of the abstract. $\;$
Jul
26
revised Converting a pre-image resistant hash to second pre-image resistant
gave paper's title
Jul
25
answered Simulator in Private Outsourced Computation over Outsourced Datasets
Jul
25
revised Can a 1 byte difference in AES 128 bit keys make huge difference in output?
fixed title's grammar
Jul
23
comment What is k in RSA?
No, since the image should have an open-parenthesis just before the $k$. $\;$
Jul
23
revised How can I generate a good password from a SHA512 hash?
general copy-editing
Jul
23
comment What is k in RSA?
You go to the "Computation" section of the page I linked to. $\;$
Jul
23
answered What is k in RSA?
Jul
23
revised How can I read the AE figures?
replaced noun-phrase with question and replaced "in-" with "input"
Jul
22
answered Converting a pre-image resistant hash to second pre-image resistant
Jul
22
comment Shuffleless PRNG function with non-repeating values?
There is a much cheaper and more efficient method; it just only does the $\hspace{1.76 in}$ currently-relevant parts of each shuffle. $\;$
Jul
22
comment Shuffleless PRNG function with non-repeating values?
"without shuffles/arrays" seems like a rather arbitrary requirement. $\;$
Jul
22
comment i cant understand the meaning and the difference between linearity equation and affine and non linearity?
The expression with $\oplus$s. $\;$
Jul
22
comment i cant understand the meaning and the difference between linearity equation and affine and non linearity?
That expression is affine even if $\: a_{\hspace{.02 in}0}\hspace{-0.03 in} = 0 \;$. $\;\;\;\;$
Jul
20
comment Implementing forward secrecy in OpenPGP with public key authentication
In other words, do you also require forward authenticity? $\;$
Jul
20
comment Implementing forward secrecy in OpenPGP with public key authentication
"forward secrecy" ... "sent from that user." $\:$ Do you actually mean forward security? $\:$ The situations for secrecy and authenticity are rather different. $\;\;\;\;$