Re: Time Expiry Alogorithm??

[Florian Weimer <fw () deneb enyo de>]

* Andrew Farmer:

> Especially considering that there aren't enough atoms in the universe to
> store all that precalculated data, nor enough energy to do all the
> calculations.

Typically, such estimates ignore the possibilities of quantum
superpositions.

> (Schneier says that there's enough energy in a supernova to do about
> 2^224 operations on a 100% efficient computer. And remember that AES
> or PGP take multiple operations to calculate results...)

Schneier's estimates are wrong.  They are based on the incorrect
assumption that all bit operations are irreversible and
entropy-increasing.  There is no hard evidence that this is true in
general.

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html