Re: UK Sunday Times: "Steal the face right off your head"

2000-12-15 Thread Ray Dillinger



On 13 Dec 2000, Jaap-Henk Hoepman wrote:

>According to these experts, any method for detecting gloves, dead fingers
>etc. cannot be made very reliable because the variation of the physical
>properties whose measurement these systems rely on is very large. Increasing
>the reliability would also increase the false rejection ratio, making the
>systems unusable.

Last time I had to use such a system, It considered my 
fingertip "dead or artificial" and refused to open.  

Side effect of having very thick dry skin that's not very 
conductive electrically.

Bear





Re: IBM press release - encryption and authentication

2000-12-15 Thread Bram Cohen

On 14 Dec 2000, Nikita Borisov wrote:

> I think, though, that the "parallelization-friendliness" of the result
> is much more interesting than being able to encrypt and MAC at the same
> time.

Encrypt and MAC together are pretty useful too - it can result in a factor
of two improvement in speed on a single CPU system.

There's an improved version of the IBM mode at
http://csrc.nist.gov/encryption/aes/modes/ in the 'OCB mode' paper.

Clearly, it's a good idea to wait for new developments to stop happening
to use the new modes.

-Bram Cohen

"Markets can remain irrational longer than you can remain solvent"
-- John Maynard Keynes