Quantum key distribution with single photons (BBC) {future of net security?}

[eppur_se_muova]

By Jason Palmer
Science and technology reporter, BBC News

German researchers have improved a method to make secure codes called quantum key distribution (QKD) by using the smallest possible packets of light.

The approach's security exploits the fact that quantum systems, once observed, are irrevocably changed.

Previous work using light beams of many photons has suffered reduced security, as some light could be intercepted.

The work outlined in the New Journal of Physics solves this issue by using electricity to generate single photons.

That brings closer the prospect of global-scale, functionally uncrackable code distribution.
***
more: http://www.bbc.co.uk/news/science-environment-19097605

[FiveGoodMen]

1. If it works, the US will outlaw it.

They want to spy on everyone.

[Warpy]

2. Nah, they'll just make it complicated and expensive enough

that it's restricted to government and corporations and that the citizenry remains vulnerable to snooping.

That's usually how this stuff works.