Re: quantum hype

2003-09-13 Thread John S. Denker
On 09/13/2003 05:43 PM, David Wagner wrote: > > I believe the following is an accurate characterization: > Quantum provides confidentiality (protection against eavesdropping), > but only if you've already established authenticity (protection > against man-in-the-middle attacks) some other way. I

Re: quantum hype

2003-09-13 Thread David Wagner
martin f krafft wrote: >David Wagner <[EMAIL PROTECTED]> writes: >> You're absolutely right. Quantum cryptography *assumes* that you >> have an authentic, untamperable channel between sender and >> receiver. The standard quantum key-exchange protocols are only >> applicable when there is some oth

Re: quantum hype

2003-09-13 Thread David Wagner
> On 09/13/2003 05:06 PM, David Wagner wrote: > > Quantum cryptography *assumes* that you > > have an authentic, untamperable channel between sender and receiver. > > Not true. The signal is continually checked for > tampering; no assumption need be made. Quantum crypto only helps me exchange

Re: quantum hype

2003-09-13 Thread John S. Denker
On 09/13/2003 03:52 PM, martin f krafft wrote: > ... any observation of the quantum stream is immediately > detectable -- but at the recipient's side, and only if checksums are > being employed, which are not disturbed by continual or sporadic > photon flips. > > someone will have > access to the 2

Re: quantum hype

2003-09-13 Thread martin f krafft
also sprach David Wagner <[EMAIL PROTECTED]> [2003.09.13.2306 +0200]: > You're absolutely right. Quantum cryptography *assumes* that you > have an authentic, untamperable channel between sender and > receiver. The standard quantum key-exchange protocols are only > applicable when there is some oth

Re: quantum hype

2003-09-13 Thread David Wagner
martin f krafft wrote: >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 >bytes,

quantum hype

2003-09-13 Thread martin f krafft
Dear Cryptoexperts, With http://www.magiqtech.com/press/navajounveiled.pdf 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

Diebold Inc.

2003-09-13 Thread R. A. Hettinga
I wonder if there are any mirrors of this out there? Cheers, RAH --- begin forwarded text Status: U Date: Fri, 12 Sep 2003 18:36:13 -0700 From: Elias <[EMAIL PROTECTED]> User-Agent: Mozilla/5.0 (Windows; U; WinNT4.0; en-US; rv:1.0.2) Gecko/20021120 Netscape/7.01 To: Fork <[EMAIL PROTEC