On Tue, 17 May 2016, Peter Gutmann wrote: > The Doctor <dr...@virtadpt.net> writes: > > >It took me an afternoon to write some Python to measure the times in between > >particles hitting the tube, hash them, and cat them into /dev/urandom. > > A geiger counter is really a whiteboard-only source of entropy, it's a nice > textbook example but not really practical for real-world use.
how about a lavalamp :^) in a remote slashdot thread from 15yrs ago https://slashdot.org/story/01/01/26/1617217/the-ascii-cam "actually, I read about a group who was doing just that (in some old issue of wired, I think). they used a bank of video cameras set up in front of lava lamps (good for random input) then hashed the video feeds into a string of nice random noise. " https://slashdot.org/comments.pl?sid=10189&cid=479517 back then I got a private email from someone at Sun confirming they were using hasciicam on lavalamps and sharing read-only text dumps via NFS. Not sure this was in Portland, but I'm quite sure this is the dream of the 90's :^D ciao -- Denis Roio aka Jaromil http://Dyne.org think &do tank CTO and co-founder free/open source developers 加密 6113 D89C A825 C5CE DD02 C872 73B3 5DA5 4ACB 7D10 _______________________________________________ cryptography mailing list cryptography@randombit.net http://lists.randombit.net/mailman/listinfo/cryptography
