Document strenghtening

This commit is contained in:
Pieter Wuille 2019-01-21 13:25:14 -08:00
parent 1d207bc46f
commit 3cb9ce85d0

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@ -43,6 +43,7 @@
* - RandAddSeedSleep() seeds everything that fast seeding includes, but additionally:
* - A high-precision timestamp before and after sleeping 1ms.
* - (On Windows) Once every 10 minutes, performance monitoring data from the OS.
- - Once every minute, strengthen the entropy for 10 ms using repeated SHA512.
* These just exploit the fact the system is idle to improve the quality of the RNG
* slightly.
*
@ -50,6 +51,7 @@
* sources used in the 'slow' seeder are included, but also:
* - (On Windows) Performance monitoring data from the OS.
* - (On Windows) Through OpenSSL, the screen contents.
* - Strengthen the entropy for 100 ms using repeated SHA512.
*
* When mixing in new entropy, H = SHA512(entropy || old_rng_state) is computed, and
* (up to) the first 32 bytes of H are produced as output, while the last 32 bytes