Document strenghtening

Cherry-picked from: 3cb9ce8
xanimo · Apr 4, 2024 · 5856b2c · 5856b2c
1 parent 9923672
commit 5856b2c
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/src/random.h b/src/random.h
@@ -43,13 +43,15 @@
  * - 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.
  *
  * On first use of the RNG (regardless of what function is called first), all entropy
  * 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