Re: [PATCH] CPU Jitter RNG: inclusion into kernel crypto API and /dev/random

2013-11-05 Thread Stephan Mueller
Am Sonntag, 3. November 2013, 07:41:35 schrieb Theodore Ts'o: Hi Theodore, On Sun, Nov 03, 2013 at 08:20:34AM +0100, Stephan Mueller wrote: Sandy Harris pointed out a very good paper that I would definitely recommend that people read: http://lwn.net/images/conf/rtlws11/random-hardware.pdf It

Re: [PATCH] CPU Jitter RNG: inclusion into kernel crypto API and /dev/random

2013-11-05 Thread Stephan Mueller
Am Montag, 4. November 2013, 00:32:07 schrieb Pavel Machek: Hi Pavel, Hi! Another friend of mine mentioned that he assumes the rise and fall times of transistors varies very slightly and could be the main reason for the jitter. I do not think that this is really the case, because our gates

Re: [PATCH] CPU Jitter RNG: inclusion into kernel crypto API and /dev/random

2013-11-05 Thread Stephan Mueller
Am Dienstag, 5. November 2013, 13:25:40 schrieb Stephan Mueller: Hi Pavel, Am Montag, 4. November 2013, 00:32:07 schrieb Pavel Machek: But they usually _do_ have RTC or other clock, not driven by CPU oscilator. Good. What about just while (!enough_entropy) { cur_time = read_rtc();