# Speed of AES vs. SHA-1

**From:** Tom (*teshrim@ucdavis.edu*)

**Date:** 04/16/03

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From: teshrim@ucdavis.edu (Tom) Date: 16 Apr 2003 12:13:24 -0700

In the current best implementation of AES, how fast is a single

*enciphering* operation (i.e., how fast is AES after key setup)? Does

there exist an implementation of AES optimized for the key being fixed

for every enciphering call?

How fast is the current best implementation of SHA-1? SHA-256?

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