Messages in this thread | | | Subject | Re: ssh primer (was Re: pull vs push (was Re: [bk patch] Make cardbus compile in -pre4)) | From | Harald Arnesen <> | Date | Thu, 14 Feb 2002 12:00:03 +0100 |
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Rob Landley <landley@trommello.org> writes:
> Not that it's worth it. Keys get exponentially more difficult to > brute force as the key length increases. I read part of a book a > long time ago (might have been called "applied cryptography") that > figured out that if you could build a perfectly efficient computer > that could do 1 bit's worth of calculation with the the amount of > energy in the minimal electron state transition in a hydrogen atom, > and you built a dyson sphere around the sun to capture its entire > energy output for the however many billion years its expected to > last, you wouldn't even brute-force exhaust a relatively small > keyspace (128 bits? 256 bits? Something like that). > > Somebody else here is likely to recognize the above anecdote and give a more > accurate reference. Book title and page number would be good...
Bruce Schneier's "Applied Cryptography" (second edition, may be in the first edition as well), pages 157-158 ("Thermodynamic Limitations"). -- Hilsen Harald. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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