Re: First quantum crypto bank transfer

2004-08-23 Thread Matt Crawford
| However, I still don't believe that quantum cryptography can buy you | anything but research funding (and probably easier lawful intercept | because end-to-end encryption is so much harder). Not to attack you personally - I've heard the same comments from many other people - but this is a remar

Re: More problems with hash functions

2004-08-23 Thread Jerrold Leichter
It strikes me that Joux's attack relies on *two* features of current constructions: The block-at-a-time structure, and the fact that the state passed from block to block is the same size as the output state. Suppose we did ciphertext chaining: For block i, the input to the compression function i

Re: First quantum crypto bank transfer

2004-08-23 Thread Jerrold Leichter
| > The press will always focus on things people understand, and which | > seem to have short-term relevance. If you're objecting to researchers | > blowing their own horns ... well, that's the way the world works. | > It's certainly been the way physics has had to work since it became | > impossib

Re: First quantum crypto bank transfer

2004-08-23 Thread Florian Weimer
* Bill Stewart: > I agree that it doesn't look useful, but "lawful intercept" is harder, > if you're defining that as "undetected eavesdropping with > possible cooperation of the telco in the middle", > because quantum crypto needs end-to-end fiber so there's > nothing the telco can help with exce

Re: First quantum crypto bank transfer

2004-08-23 Thread John Denker
Jerrold Leichter <[EMAIL PROTECTED]> wrote: The press will always focus on things people understand, and which seem to have short-term relevance. If you're objecting to researchers blowing their own horns ... well, that's the way the world works. It's certainly been the way physics has had to wor

On hash breaks, was Re: First quantum crypto bank transfer

2004-08-23 Thread Joseph Ashwood
Since the rest has been covered quite well, I will instead focus on the comparison of AES and SHA-0, RIPEM, MD5, etc. - Original Message - From: "Jerrold Leichter" <[EMAIL PROTECTED]> Subject: Re: First quantum crypto bank transfer Alternatively, how anyone can have absolute confidence

Bad day at the hash function factory

2004-08-23 Thread Greg Rose
Phil Hawkes' paper on the SHA-2 round function has just been posted as Eprint number 207. It contains rather a lot of detail, unlike some of the other papers on the subject of hash function collisions. Greg. Greg RoseINTERNET: [EMAIL PROTECTED] Qualcomm Austra