[cylon13]

Any noise strong enough to have a good chance of hiding the signal would completely defeat the benefit of having dynamic frequency scaling in the first place, I think.

[bobbylarrybobby]

What if you discretized the allowed frequencies and linked the rate at which the cpu could switch?

[sneak]

Except that the processor can be doing other work during artificially induced noise delays, something not possible with delays introduced by lower mean frequency.

[staticassertion]

An additional millisecond to your public key exchange is probably not going to matter - key exchange is pretty infrequent anyway.