[Cryptech Tech] today's notes

[Joachim Strömbergson]

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Aloha!

★ STMAN ★ wrote:
> Do you mean a great VHDL design of a good RNG will be available soon
> ? Will it be published on OpenCores ?

(We normally don't use VHDL, but Verilog.) The designs will be available
on the Cryptech servers.

The first version of the Cryptech RNG will have three different types of
entropy sources:

(1) An avalanche noise based entropy source external to the FPGA. This
source is designed by Benedict and Fredrik.

(2) A ring oscillator based entropy source placed internally in the
FPGA. This source is designed by Bernd and me.

(3) A pseudo entropy source that basically feedbacks some of the words
generated by the CSPRNG (words not available at the CSPRNG output.)

All three sources feed a common mixer (based on SHA-512) that is used to
generate seeds. The seeds are then used to initialize the CSPRNG which
is based on the stream cipher ChaCha.


- -- 
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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