[RC5] new decryption project

Chase Covello chasec at pacbell.net
Fri Dec 1 14:04:56 EST 2000


On 2000.11.30 07:09:20 -0800 Zorba the Hutt wrote:
> 
> 448-bit? that's not happening any time this century ;)
> 
> Seriously - take a look at the stats and time it's taken for RC5-64. 36%
> done, in 1134 days. Each bit doubles the complexity (I'm ignoring whether
> or
> not Blowfish is more complex than RC5 or not) - so, that would mean a
> 448-bit encryption has about 3.940200619639447921227904010014e+115 times
> more keys than RC5. Correct me if I'm wrong, but at our current rate,
> isn't
> that long after the eventual heat death of the universe?

Sure. I think Applied Cryptography said 128 or 160 bit was longer than the
lifetime of the Universe. At 448 bit, torture is more effective ;)
 
> Ah well . . . maybe in a few hundred years, if Moore's law keeps going .

Watch out for those quantum computers. One, if it could be built, could
solve this instantly.

-- 
"Those who would give up essential liberty to purchase a little temporary
safety deserve neither liberty nor safety." -Benjamin Franklin, 1759

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