October 17, 2008

Quantum Encryption

Perfect secrecy has come a step closer with the launch of the world's first computer network protected by unbreakable quantum encryption at a recent scientific conference in Vienna.

Quantum cryptography is completely different from the kinds of security schemes used on computer networks today.

Quantum systems use the laws of quantum theory, which have been shown to be inherently unbreakable.

The basic idea of quantum cryptography was worked out 25 years ago by Charles Bennett of IBM and Gilles Brassard of Montreal University, who was in Vienna to see the network in action.

"All quantum security schemes are based on the Heisenberg Uncertainty Principle, on the fact that you cannot measure quantum information without disturbing it.", he explained.

"Because of that, one can have a communications channel between two users on which it's impossible to eavesdrop without creating a disturbance. An eavesdropper would create a mark on it. That was the key idea."

 

BBC News - October 10, 2008 - 'Unbreakable' encryption unveiled

http://news.bbc.co.uk/2/hi/science/nature/7661311.stm

Entry categories: Security
Posted by Jorgen Thelin at October 17, 2008 09:25 PM - [PermaLink]