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Re: 2047 bit keys in PGP

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NODE 9bb6671bRe: 2047 bit keys in PGP "Mark Grant, M.A. (Oxon)" <mark@unicorn.com>Fri, 5 Jan 1996 02:53:00 +0800

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