Ring oscillators (more specifically, XOR or other mixing operations between at least two oscillators) are a good basis for a TRNG. I've implemented one of my o

Ring oscillators (more specifically, XOR or other mixing operations between at least two oscillators) are a good basis for a TRNG. I've implemented one of my own (source code now lost :() : https://emergent.unpythonic.net/projects/hm2rng https://emergent.unpythonic.net/projects/hm2rng with links to an academic paper that still works. the whirlygig rng page appears to have moved to https://warmcat.com/hardware%20design/linux%20peripherals/2007/11/24/whirlygig-gpld-hwrng.html https://warmcat.com/hardware%20design/linux%20peripherals/20...