[46472] in Cypherpunks
Re: 2047 bit keys in PGP
daemon@ATHENA.MIT.EDU (Mark Grant, M.A. (Oxon))
Thu Jan 4 13:00:26 1996
Date: Thu, 4 Jan 1996 17:39:32 +0000 (GMT)
From: "Mark Grant, M.A. (Oxon)" <mark@unicorn.com>
To: cypherpunks@toad.com
On 4 Jan 1996, Ian Goldberg wrote:
> in a brute-force search. From Applied Crypto, 2nd ed, pp157-158,
> setting or clearing one bit takes at _least_ 4.4*10^-16 erg of energy.
I thought reversible computing could use an arbitarily small amount of
energy in computations ? Or is it that you can use it to get down to this
level of energy loss, but not below ? I'm not sure.
Mark
