There's a discussion going around the internet about Intel possibly
backdooring Linux with RdRand.
"Two years ago Linus overrode a decision by the maintainer of /dev/random and
made a decision to include a patch by Intel which would make Linux rely
blindly on output from RdRand (an implementation sealed in a chip and
impossible to audit)"
http://www.reddit.com/r/linux/comments/1lucdy/did_linus_torvalds_backdoor_linux_random_number/
Whether it is true or not, I was wondering if Linux-libre is using RdRand?