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

[James A. Donald]

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.