Friday, January 13, 2017

[nqxjypxr] Tunable urandom

On Linux, /dev/random blocks when high quality random bits are not available, but /dev/urandom continues to emit "only cryptographically strong" bits even if it hasn't been able to mix in entropy for a long time.

Wanted is something tunable in between: it blocks when the ratio of entropy in and bits out decreases below some user-specified threshold.

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