Quantum Cryptography

Paul Hoffman paul.hoffman at vpnc.org
Fri Jun 22 11:41:27 EDT 2007

At 10:59 AM -0700 6/21/07, Ali, Saqib wrote:
>>     - Quantum Cryptography is "fiction" (strictly claims that it solves
>>       an applied problem are fiction, indisputably interesting Physics).
>Well that is a broad (and maybe unfair) statement.
>Quantum Key Distribution (QKD) solves an applied problem of secure key
>distribution. It may not be able to ensure "unconditional" secrecy
>during key exchange, but it can detect any eavesdropping. Once
>eavesdropping is detected, the key can be discarded.

...whereas the key distribution systems we have aren't affected by 
eavesdropping unless the attacker has the ability to perform 2^128 or 
more operations, which he doesn't.

Which part of the word "useless" is not apparent here?

--Paul Hoffman, Director
--VPN Consortium

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