[cryptography] [liberationtech] Random number generator failure in Rasperri Pis?

Mahrud S dinovirus at gmail.com
Fri Jul 19 13:13:00 EDT 2013


Isn't the thermal noise a good enough entropy source? I mean, it's a $25
computer, you can't expect much of it.

On Fri, Jul 19, 2013 at 8:44 AM, David Johnston <dj at deadhat.com> wrote:

> On 7/19/2013 5:44 AM, Peter Gutmann wrote:
>
>> Eugen Leitl <eugen at leitl.org> quotes:
>>
>>  Just came accross this article, apparently showing the bad quality of the
>>> hardware RNG in Raspberri Pi devices.
>>>
>>> http://scruss.com/blog/2013/**06/07/well-that-was-**
>>> unexpected-the-raspberry-pis-**hardware-random-number-**generator/<http://scruss.com/blog/2013/06/07/well-that-was-unexpected-the-raspberry-pis-hardware-random-number-generator/>
>>>
>> That shows the bad quality of RANDU.  It shows that the Pi randomness
>> source
>> seems OK, at least as determined by rngtest.
>>
>>  But I haven't seen anything from the manufacturer to state how OK the
> randomness source is. A conservative model for min-entropy based on the
> circuit structure would be a start.
>
>
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-- 
mahrud <algorithms.jux-foundation.org/~mahrud/blog>
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