Re: DES-Busting Screen Savers?
On the subject of choosing keys randomly, rather than dividing up the keyspace... This seems like a very good idea to me. One potential problem is actually choosing the random keys. Have to be able to get entropy at a fast rate, and/or use a good PRNG. Both of these things would take time away from the actuall cracking (more time than just incrementing the key). And if a weak PRNG is used in order to save time, it's possible that it might favour certain keys and thus interfere with the attempt. Any ideas for a fast and good PRNG? ===================================================================== | Steve Reid - SysAdmin & Pres, EDM Web (http://www.edmweb.com/) | | Email: steve@edmweb.com Home Page: http://www.edmweb.com/steve/ | | PGP (2048/9F317269) Fingerprint: 11C89D1CD67287E68C09EC52443F8830 | | -- Disclaimer: JMHO, YMMV, TANSTAAFL, IANAL. -- | ===================================================================:)
A few seconds ago, I wrote:
One potential problem is actually choosing the random keys. Have to be able to get entropy at a fast rate, and/or use a good PRNG. Both of these things would take time away from the actuall cracking (more time than just incrementing the key).
It's probably best to just choose a random starting point, and increment from there. I don't think that will affect the odds any. Problem solved. I thought of this less than a second after I sent the message out. :-/ ===================================================================== | Steve Reid - SysAdmin & Pres, EDM Web (http://www.edmweb.com/) | | Email: steve@edmweb.com Home Page: http://www.edmweb.com/steve/ | | PGP (2048/9F317269) Fingerprint: 11C89D1CD67287E68C09EC52443F8830 | | -- Disclaimer: JMHO, YMMV, TANSTAAFL, IANAL. -- | ===================================================================:)
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Steve Reid