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Providing Random Entropy

Started by rgmhtt, June 02, 2017, 07:38:48 pm

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June 02, 2017, 07:38:48 pm Last Edit: March 05, 2018, 04:59:14 pm by rgmhtt
Random entropy is required for both servers and clients using any crypto protocol.

At least on Fedora/Centos you can check your available entropy with:

cat /proc/sys/kernel/random/entropy_avail

This SHOULD be at least 2000.  Depending on your software you may constantly be using this, or only as a send to a PRF.

First thing to try is install rng-tools.  On the CubieTruck, this can get avail entropy up to 1500.

The best thing to do is install haveged.

See my write up on this at: