On Sun, Feb 10, 2013 at 08:32:37PM +0100, Stephan Mueller wrote:
>
> Given all your doubts on the high-precision timer, how can you
> reasonably state that the Linux kernel RNG is good then?
Because we're measuring intervals that are substantially larger than
"CPU jitter". (i.e., inputs from key
On Sun, Feb 10, 2013 at 2:32 PM, Stephan Mueller wrote:
> On 10.02.2013 19:50:02, +0100, Theodore Ts'o wrote:
> Given all your doubts on the high-precision timer, how can you
> reasonably state that the Linux kernel RNG is good then?
>
> The data from add_timer_randomness the kernel feeds into
On 10.02.2013 19:50:02, +0100, Theodore Ts'o wrote:
Hi Ted,
> On Sun, Feb 10, 2013 at 01:46:18PM +0100, Stephan Mueller wrote:
>> However, the CPU has timing jitter in the execution of instruction. And
>> I try to harvest that jitter. The good thing is that this jitter is
>> always present and ca
On Sun, Feb 10, 2013 at 1:50 PM, Theodore Ts'o wrote:
> On Sun, Feb 10, 2013 at 01:46:18PM +0100, Stephan Mueller wrote:
>>
>> However, the CPU has timing jitter in the execution of instruction. And
>> I try to harvest that jitter. The good thing is that this jitter is
>> always present and can b
On Sun, Feb 10, 2013 at 01:46:18PM +0100, Stephan Mueller wrote:
>
> However, the CPU has timing jitter in the execution of instruction. And
> I try to harvest that jitter. The good thing is that this jitter is
> always present and can be harvested on demand.
How do you know, though, that this is
OK, my original reading of the mixing code was not accurate. This time
around, I started with the original posted tarball and turned the use of
the CPU clock into a very simple and clearly bad "clock" that will
provide no entropy.
--- jitterentropy-0.1/jitterentropy.c 2013-02-08 15:22:22.0
On 10.02.2013 02:57:51, +0100, Jeff Epler wrote:
Hi Jeff,
> On Sat, Feb 09, 2013 at 01:06:29PM -0500, Theodore Ts'o wrote:
>> For that reasons, what I would suggest doing first is generate a
>> series of outputs of jitterentropy_get_nstime() followed by
>> schedule(). Look and see if there is an
On 09.02.2013 19:06:29, +0100, Theodore Ts'o wrote:
Hi Ted,
thank you for the review.
> On Fri, Feb 08, 2013 at 11:04:54PM +0100, Stephan Mueller wrote:
>> * an array of statistical test suites pass the output of the entropy
>> collector
>> (again, the output is not mangled with cryptography)
