1. DieHarder: A random number test suite.
http://www.phy.duke.edu/~rgb/General/dieharder.php
2. ENT—a pseudorandom number sequence test program.
http://fourmilab.ch/random
3. ID Quantique—quantum-safe crypto-photon counting—randomness.
http://www.idquantique.com/
4. Tails bug report #7675.
https://labs.riseup.net/code/issues/7675
5. Tor bug report #10402.
https://trac.torproject.org/projects/tor/ticket/10402