In a recent Monsters and Critics article, it is claimed:
How?Photon physics used to foil hackers
Feb 23, 2006, 2:06 GMT
TORONTO, ON, Canada (UPI) -- A University of Toronto scientist says he is using photon physics to prevent hackers from obtaining sensitive government and business data.
A wonderful explanation can be found, via Wikipedia (click on link for full article):
An exerpt:.Quantum cryptography is an approach to securing communications based on certain phenomena of quantum physics
Essentially, rather than using mathematical techniques to encrypt data - which can invariably be worked out, quantum cryptography focuses on "the physics of information" - such as the photons of light passing along a fibre optic wire etc.
Here is A Bibliography of Quantum Cryptography with some downloadable papers.
If folks have some more info about this technology, please post it