[Cryptech Tech] Key generation and storage

[Joachim Strömbergson]

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Aloha!

Peter Gutmann wrote:
> Rob Austein <sra at hactrn.net> writes:
> 
>> a) In case it wasn't clear, I was assuming that key generation on
>> the ARM was in software, eg, cryptlib, not in some spooky hardware
>> thing on the ARM.
> 
> It also depends on what bits you label "key generation", for example
> are the bignum primitives (tied together by higher-level code)
> keygen, or the combination of bignum primitives + code that calls
> them keygen?  If the bignum primitives will be done in the FPGA then
> at least some portion of the keygen process will happen there.
> 
> In any case doing something like Lim-Lee (for DLP keys) in an FPGA
> would be a bit of a nightmare...

What we have previously discussed is having the random number generation
and modexp operations in the FPGA, and having things like primality
testing etc in SW on the ARM. It would be a bit of a hairball doing them
in HW. But a restricted engine like PicoBlaze might be able to do it.


- -- 
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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