Dingo13
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 Apr 27 awarded Popular Question Apr 22 awarded Popular Question Feb 19 awarded Nice Question Jan 19 comment Does the time to evaluate a hash function depend on the function input size? Thanks for your answer, but it is not curious that you implement a random oracle with a real world hash function... ? Jan 14 asked Does the time to evaluate a hash function depend on the function input size? Dec 4 awarded Popular Question Nov 19 awarded Popular Question Nov 1 comment Existence of a random function under constraints @fgrieu Thanks. There were errors in my post. There are two values $C_1$ and $C_2$. I've updated it. Nov 1 revised Existence of a random function under constraints added 19 characters in body Oct 31 comment Existence of a random function under constraints @fkraiem If you want I can update my post by saying that the functions are chosen at random in the set of functions from $\{0,1\}^N$ to $\{0,1\}^N$. Oct 31 asked Existence of a random function under constraints Sep 24 awarded Notable Question Sep 2 comment AES decryption vs encryption speed Thanks "So It does not matter which one you use in CTR, both should give essentially same performance." If AES-decrypt is faster than AES-encrypt then CTR will be faster when used with AES-decrypt ,won't it ? Sep 2 asked AES decryption vs encryption speed Sep 2 comment Does CTR mode yield a PRF? @Yehuda Lindell If we can distinguish it from a function drawn uniformly at random, then it is a pseudo-random function, isn't it ? Maybe there is something that I don't see... Sep 1 comment Does CTR mode yield a PRF? It seems to me that when $k$ is random $G(k)$ is pseudo-random. For what reason $G$ is not a prf ? Thank you in advance. Aug 29 comment Does CTR mode yield a PRF? A PRG is not a PRF ? Aug 29 comment Does CTR mode yield a PRF? Thanks for the answer and the comments. I've updated the post. The idea looks like the one proposed by Richie. Aug 29 comment Does CTR mode yield a PRF? Thanks for your answer. I've updated the post. Aug 29 revised Does CTR mode yield a PRF? added 331 characters in body