Michael McConville <mmcconv1 <at> sccs.swarthmore.edu> writes: > https://www.hyperelliptic.org/tanja/vortraege/random.pdf
made my day: “The way RDRAND is being used in kernels <= 3.12.3 allows it to cancel out the other entropy. See extract buf().” “if I make RDRAND return [EDX] ^ 0x41414141, /dev/urandom output will be all ’A’.”