Re: Looking for bruteforce times

From: Andrew Lee (gladius@gladius.f9.co.uk)
Date: 02/17/03 

From: Andrew Lee <gladius@gladius.f9.co.uk>
Date: Mon, 17 Feb 2003 12:14:44 +0000 (UTC)

Paul Crowley <paul@JUNKCATCHER.ciphergoth.org> a écrit:

> unruh@string.physics.ubc.ca (Bill Unruh) writes:
>> Paul Crowley <paul@JUNKCATCHER.ciphergoth.org> writes:
>> ]na@nospam.org (lurker) writes:
>> ]> I imagine significant advantages for key cracking could be gained
>> ]> in a zero gravity environment but there does not seem to be any
>> ]> references to cracking codes in orbit, There might not be enough
>> ]> payback for cracking long keys by brute force since usually other
>> ]> methods can be used for key recovery.
>>
>> ]I recommend discussing this plan with Douglas Eagleson, he may have
>> ]some insights worthy of it.
>>
>> Actually, you can get for more advantage by doing the cracking while
>> hanging the whole room, including the computer, upside down. This
>> reverses gravity for those in the room, and since one is trying to
>> decrypt something which was almost certainly encrypted in normal
>> gravity, this reversal should make the cracking far far easier. Zero
>> gravity is just neutral from the point of view of encryption and
>> decryption.
>
> In the late eighties and early nineties, you could tell faster
> computers from slower ones, because the slower ones used horizontal
> desktop style cases while the faster ones used tower cases. Today the
> tower case has almost completely won out. This is because putting a
> computer on its side allows it to run faster, since the electrons get
> a little helping hand from gravity.
>
> This is also why laptop computers tend to be a little slower.

However, an unforseen problem with the tower configuration is that, while
the effects of gravity on the electron flow have a percievable benefit on
performance, the storage capacity of the hard drive is affected in tower
systems where the drive is mounted vertically or sideways. Such non-
conventional mounting has the effect of the data "dripping" towards the
lower side of the disk giving a unbalanced mean data distribution.
In crypto terms this means it takes longer to encrypt bits on the "down"
side of the disk, as they will have drifted further from the center so it
takes longer to fetch them back. 

-- 
Andrew Lee | gladius@gladius.f9.org.uk \PGP:DC84 FD28 DA8A E38A A9DD|
AVIEN Founding Member |http://avien.org \ID:18A9 AFAD 5422 43F1 4C81|           
// It is not certain that everything is uncertain -- Blaise Pascal
// Opinions expressed are my personal views, not those of my employer

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