[Cryptech Tech] New version of the sha1 core in the repo.

[Joachim Strömbergson]

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Aloha!

I've just pushed a new version of the SHA-1 core to the repo. This
version use a sliding window implementation for the W memory that quite
drastically reduced the resources needed and increased maximum clock
frequency. I have also updated the README with more info about the core
and some new measurements for different FPGA devices.

Any comments, reviews, data on other devices, simulation results etc
greatly appreciated.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
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 Joachim Strömbergson          Secworks AB          joachim at secworks.se
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