Å®ÉúСÊÓƵ

A measure for the multiverse

3 March 2010

Is our universe just one of many? The idea divides physicists, but now one researcher has found the first hint that the multiverse really exists

Quantum computers get commercial – and hackable

29 April 2009

Machines that compute using quantum principles are arriving on the market at last, but claims of unbreakable security look unfounded

'Quackers' tarnish quantum secrecy's halo of invincibility

15 October 2008

As the first network protected by quantum cryptography is switched on, eavesdroppers are using increasingly sophisticated methods to crack such "unhackable" systems

Laser cracks 'unbreakable' quantum communications

3 October 2008

Sending a bright pulse of light lets an eavesdropper hijack quantum equipment so they can intercept secrets without detection

'Twisting' light packs more information into one photon

23 March 2008

How much can you say with a single photon? Until now, the limit has been 1 bit of information – a new quantum twist raises that to 1.63 bits

Feedback

2 January 2008

'Quantum ATM' rules out fraudulent web purchases

7 November 2007

A "quantum key" passed from the ATM to a cellphone could make it impossible for someone to use your credit card to make fraudulent transactions online

'Half-quantum' cryptography promises total security

17 October 2007

Sharing an encryption key securely is possible even if one party remains firmly rooted in the world of classical physics

The second quantum revolution

20 June 2007

To track down a theory of everything, we might have to accept that the universe only exists when we're looking at it

Noise keeps spooks out of the loop

23 May 2007

A novel method of encrypting messages is proposed that uses the natural thermal noise created by resistors