[Cryptography] Fun with hardware RNGS: the Infinite Noise Multiplier

[Phillip Hallam-Baker]

On Sun, Dec 8, 2013 at 3:15 AM, James A. Donald <jamesd at echeque.com> wrote:

> On Sun, Dec 08, 2013 at 02:14:33PM +1000, James A. Donald wrote:
>
>> Looks to me that if you perturb this circuit, you will get a
>>>
>>> different, but equally random set of bits, for, no matter what the
>>> perturbation, any noise in the system gets amplified to infinity,
>>>
>>> even if the enemy is injecting a signal that is cleverly designed to
>>> mess with it.
>>>
>>
> On 2013-12-08 16:43, Viktor Dukhovni wrote:
>
>> That would be true of the mathematically ideal circuit.  Yes, the
>> baker's transformation is ergodic.  However, the physical circuit
>> has finite sensitivity.
>>
>
> No, a physical circuit does not have a finite sensitivity.  It has a
> finite noise floor.


What about RF emissions made by the circuit?

This contraption seems like it would bleed its output into the RF spectrum.

-- 
Website: http://hallambaker.com/
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