Re: Seagate announces hardware FDE for laptop and desktop machines

2007-09-10 Thread ji

Dave Korn wrote:

On 07 September 2007 21:28, Leichter, Jerry wrote:


Grow up.  *If* the drive vendor keeps the mechanism secret, you have
cause for complaint.  But can you name a drive vendor who's done
anything like that in years?  


  All DVD drive manufacturers.  That's why nobody could write a driver for
Linux until CSS was cracked, remember?



It wasn't the mechanism that was secret so much as the key.  CSS was 
supposed to protect someone else's data.  You wouldn't give the key to 
*your* drive away, would you?


/ji

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What is a proof?

2007-09-10 Thread James A. Donald
If a proof is a record of a mental journey in which one person has 
discovered an important truth, and then made a record of that journey 
adequate so that a second person can walk the same path and see the same 
truth, then cryptography could do with more and better proofs.


If, on the other hand, a proof is an argument impressively decorated 
with mathematical sounding jargon, cryptography could do with a good 
deal fewer of them.


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RE: In all the talk of super computers there is not...

2007-09-10 Thread Dan Walker
True, the contestants are given extra information, though.  They know
ahead of time that the words make up the name of a place, or a common
saying, for example.  That helps decrease the entropy considerably.  They
also know the exact number of characters in the final answer and are able
to probe multiple characters in the phrase simultaneously.

If a system is setup correctly, you should never be able to get a hint as
to whether you have guessed any portion of a password correctly, and you
probably don't know what sort of phrase the target has chosen, so it would
seem like most of the entropy-reducing information the Wheel of Fortune
contestant is able to take advantage of are not available to a password
cracking algorithm.

--dan

 While 2.5 bits/word seems low, the TV game show Wheel Of Fortune is
 evidence that
 people can correctly guess phrases even when a large proportion of the
 letters
 are missing.

 Peter Trei


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