Re: quantum hype

2003-09-14 Thread David Wagner
Arnold G. Reinhold wrote: >I think there is another problem with quantum cryptography. Putting >aside the question of the physical channel, there is the black box at >either end that does all this magical quantum stuff. One has to trust >that black box. > >- Its design has to thoroughly audited

Re: quantum hype

2003-09-14 Thread Ian Grigg
David Wagner wrote: > One could reasonably ask how often it is in practice that we have a > physical channel whose authenticity we trust, but where eavesdropping > is a threat. I don't know. The only answer that I have come across - to which I ascribe no view on accuracy - is "undersea fibre" [1

Re: quantum hype

2003-09-14 Thread Bill Stewart
martin f krafft wrote: and the general hype about quantum cryptography, I am bugged by a question that I can't really solve. I understand the quantum theory and how it makes it impossible for two parties to read the same stream. However, what I don't understand is how that adds to security. It's ve

Re: quantum hype

2003-09-14 Thread Arnold G. Reinhold
At 10:18 PM + 9/13/03, David Wagner wrote: ... One could reasonably ask how often it is in practice that we have a physical channel whose authenticity we trust, but where eavesdropping is a threat. I don't know. I think there is another problem with quantum cryptography. Putting aside the que

Re: quantum hype

2003-09-14 Thread starwars
Martin F Krafft asked: > So MagiQ and others claim that the technology is theoretically > unbreakable. How so? If I have 20 bytes of data to send, and someone > reads the photon stream before the recipient, that someone will have > access to the 20 bytes before the recipient can look at the 20 > b