Unhackable networks a step closer

2012-11-20 07:34
Researchers have come up with a way of protecting telecoms networks using quantum cryptography without the need for expensive dedicated optical fibre links. (Duncan Alfreds, News24)

Researchers have come up with a way of protecting telecoms networks using quantum cryptography without the need for expensive dedicated optical fibre links. (Duncan Alfreds, News24)

Multimedia   ·   User Galleries   ·   News in Pictures Send us your pictures  ·  Send us your stories

kalahari.com

London - Researchers have come up with a way of protecting telecoms networks using quantum cryptography without the need for expensive dedicated optical fibre links.

The technique, developed by Toshiba's European research laboratory in Britain and Cambridge University engineers, is a step toward perfect security for everything from credit card transactions to private health records.

Quantum cryptography relies on the rules of quantum theory to generate uncrackable codes that encrypt data in a way that reveals if it has been eavesdropped or tampered with.

Governments and the military are thought to be using the technology already, based on systems available from firms like ID Quantique in Switzerland and US rival MagiQ.

But until now, the quantum keys to encode and decode the information had to be sent on single photons, or particles of light, across a dedicated optical fibre separate from the line carrying the data itself.

Field tests

"The requirement of separate fibres has greatly restricted the applications of quantum cryptography in the past, as unused fibres are not always available for sending the single photons, and even when they are, can be prohibitively expensive," said Andrew Shields from Toshiba Research in Cambridge.

"Now we have shown that the single photon and data signals can be sent using different wavelengths on the same fibre."

The Toshiba system, outlined in research published in the journal Physical Review X, still requires an advanced detector that picks up the encryption key in a time window of just 100 millionths of a micro-second, at the expected arrival time of the single photons.

But the detector, which is able to filter out the "noise" in the fibre caused by the data itself, avoids the cost of laying down dedicated optical fibre lines.

Previous work has managed to use quantum cryptography on shared optical fibres but only over very short distances, with low capacity rates, or with data moving only in one direction.

The researchers say their system can do it over 50km with data moving back and forth and an encryption capacity 50 000 times the record over the same distance.

Zhiliang Yuan, who worked on the research, said the team plan to carry out field tests on the system but he predicted it could be rolled out commercially within a few years.

Read more on:    internet  |  technology
NEXT ON NEWS24X

SHARE:

Read News24’s Comments Policy

24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
2 comments
Add your comment
Comment 0 characters remaining
 

Inside News24

 
/News
 
Traffic
Lottery
 
  • Tuesday Kuils River - 18:48 PM
    Road name: Polkadraai Road Eastbound
    ROADWORKS between the R102 Van Riebeeck Road and the R310 Baden Powell Drive exit
  • Tuesday Muizenberg - 10:59 AM
    Road name: Main Road Both Ways
    ROADWORKS with stop/go controls at Atlantic Road - expect peak time delays (until July 2015)
 
More traffic reports...
 

Jobs in Cape Town [change area]

Property [change area]

Travel - Look, Book, Go!

Magical Massinga

Spend 5 nights at the gorgeous Massinga Beach Lodge in Mozambique and only pay for 4 from R13 220 per person sharing. Includes return flights, accommodation, transfers and romantic turndown. Book now!

Kalahari.com - shop online today

2 TV Series for R250

Get 2 TV Series box sets for R250 and save up to R148! Offer valid while stocks last. Shop now!

Pre-order the Xbox One

Get this all-in-one entertainment system with live TV, movies, social networking and gaming. Pre-order now!

Up to 50% off hair care products!

Save up to 50% on professional hair care products at kalahari.com. Offer valid while stocks last. Shop now!

30% off academic books

Score a mind blowing 30% off academic books! Offer valid while stocks last. Shop now!

Mind blowing deals on electronics!

Save up to 35% on electronics. Offer valid while stocks last. Shop now!

OLX Free Classifieds [change area]

Samsung Galaxy s4

Mobile, Cell Phones in South Africa, Western Cape, Cape Town. Date October 24

Best bargain in big bay

Real Estate, Houses - Apartments for Sale in South Africa, Western Cape, Cape Town. Date October 25

VW Golf 6, 1.6 Trendline (Excellent condition)

Vehicles, Cars in South Africa, Western Cape, Cape Town. Date October 25

Samsung Galaxy Y

The Samsung Y (Young) is tiny but powerful with Android...

From R1499.00

I'm shopping for:

Horoscopes
Aquarius
Aquarius

The ingredients for today are communicating your original ideas in a creative and unique way that can make the right people look...read more

There are new stories on the homepage. Click here to see them.
 
English
Afrikaans
isiZulu

Hello 

Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.


Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.

Settings

Location Settings

News24 allows you to edit the display of certain components based on a location. If you wish to personalise the page based on your preferences, please select a location for each component and click "Submit" in order for the changes to take affect.








Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.