[Cryptography] Entropy Needed for SSH Keys?

[Ray Dillinger]

On 05/27/2016 07:12 AM, Kent Borg wrote:

> Is there a term for how far a photon can travel in a clock period? Well,
> whatever that might be called, if the physical distance of a second
> clock is on-order that far away--inches in this case--it feels like the
> problem changes. 

IIRC, one nanosecond was once defined to me as the approximate
amount of time it takes for light to travel fifteen centimeters.

So, something just across the room from you is probably fifteen
to thirty light-nanoseconds away, depending on the size of the
room.  Does this matter much, in terms of creating useful
interference patterns?

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