How difficult is it to break the OpenPGP 40 character long fingerprint?

Robert J. Hansen rjh at
Tue Apr 2 13:17:33 CEST 2013

On 04/02/2013 03:08 AM, Niels Laukens wrote:
> If you're running a computer at 3.2K (ambient universe temperature,
> anything below that would require additional energy to cool it), a
> bit-flip requires 4.41E-23 Joules of energy.

Off by a factor of ln 2 there, chief.  :)  Required energy to destroy a
bit of information (not necessarily flip a bit) is about 3.06 * 10**-23

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