Toshiba claims quantum key breakthrough

By on
Toshiba claims quantum key breakthrough

Paves way for one-time pad encryption.

Researchers at Toshiba's Cambridge lab claim to have made a breakthrough [PDF] in encryption which could lead to ultra-secure communications networks for banks, hospitals and government organisations.

The team demonstrated the continuous operation of quantum key distribution (QKD) with a secure bit rate exceeding 1Mbit/s over 50km of fibre.

The operation was performed over a 24-hour period at a rate 100 to 1,000 times faster than any other traffic sent over the same distance, according to Toshiba.

The researchers explained that they used a light detector for high bit rates, and a feedback system which ensures that this bit rate is as high as possible at all times.

The results of the experiment will be published in the science publication Applied Physics Letters, and Toshiba has suggested that the technology could be used to power regular occurrences of "one-time pad" encryption, which has been complex and restrictive to construct because of the excessively long keys.

"Although the feasibility of QKD with megabits per second has been shown in the lab, these experiments lasted only minutes or even seconds and required manual adjustments," said Dr Andrew Shields, a research director at Toshiba Research Europe.

"To the best of our knowledge this is the first time that continuous operation has been demonstrated at high bit rates. Although much development work remains, this advance could allow unconditionally secure communication with significant bandwidths."

Copyright ©v3.co.uk
Tags:

Most Read Articles

You must be a registered member of iTnews to post a comment.
| Register

Poll

How should the costs of Australia's piracy scheme be split?
Rights holders should foot the whole bill
50/50
ISPs should foot the whole bill
Government should chip in a bit
Other
Flash is heading towards its grave, and that's...
Great! Good riddance
Sad! Flash had some good qualities
Irrelevant. I don't care
What's Flash?
View poll archive

Whitepapers from our sponsors

What will the stadium of the future look like?
What will the stadium of the future look like?
New technology adoption is pushing enterprise networks to breaking point
New technology adoption is pushing enterprise networks to breaking point
Gartner names IBM a 'Leader' for Disaster Recovery as a Service
Gartner names IBM a 'Leader' for Disaster Recovery as a Service
The next era of business continuity: Are you ready for an always-on world?
The next era of business continuity: Are you ready for an always-on world?

Log In

Username:
Password:
|  Forgot your password?