[Cryptech Tech] Suggested changes to TRNG

[Joachim Strömbergson]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

Aloha!

Joachim Strömbergson wrote:
> Russ Housley wrote:
>> A pause seems prudent, but it is unclear to me how long it should 
>> be.

Ok, I've implemented a warmup delay solution. Right now the entropy
providers will not make any entropy available to the mixer before
WARMUP_CYCLES. Currently this value is set to 1M cycles. With a 50 MHz
clock we delay first mixing with 20 ms.

For the rosc based entropy providers this means that we will throw away
close to 4000 bits that we otherwise would have collected and used.

- -- 
Med vänlig hälsning, Yours

Joachim Strömbergson - Alltid i harmonisk svängning.
========================================================================
 Joachim Strömbergson          Secworks AB          joachim at secworks.se
========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: GPGTools - http://gpgtools.org
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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=Ua1Q
-----END PGP SIGNATURE-----