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Quantum Cryptography Hailed to be Unbreakable  (Source: BBC News)
Quantum encryption uses photons to deliver encryption keys

Data security is paramount in today's sensitive business environments. Hackers today can get into networks that store financial data like bank accounts or credit card numbers and make off with millions in stolen property.

Encryption is used on most networks that store this sort of data, but encryption is not unbreakable. A new form of encryption has been introduced at a scientific conference in Vienna. According to BBC News, the new encryption method is called quantum cryptography and it's unbreakable.

A demonstration of the quantum cryptography system was performed on a network connecting six locations around Vienna. The locations were connected using standard fiber optic cable. The quantum cryptography was devised by Charles Bennett of IBM and Gilles Brassard of Montreal University.

The basis for the cryptographic system is described by Brassard, "All quantum security schemes are based on the Heisenberg Uncertainty Principle, on the fact that you cannot measure quantum information without disturbing it."

He continued telling BBC News, "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."

The system sends faint beams of light containing single photons fired a million times per second from which a numerical key can be recovered. The advantage of the system is that if anyone eavesdrops on the communication between nodes the key is disturbed and the node shuts down. At the same time the hacked node shuts down the network is routed to another node to keep it running.

Two different methods are available to send the encryption key in the quantum system. One looks at the direction the photons are polarized and the other looks at the precise timing of the arrival of the photons. Any network using quantum cryptography put into use would have to be able to work with both types of encryption methods.

Dr. Hans Huebel from the Vienna University said, " We are constantly in touch with insurance companies and banks, and they say it's nearly better that they lose 10 million euros than if the system is down for two hours, because that might be more damaging for the bank. So that's what we have to prove, that we have a reliable system that delivers quantum keys for several weeks without interruption, and then they might be more interested."

DailyTech first reported on quantum computers for cryptography in August of 2007.



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RE: Unbreakable?
By therealnickdanger on 10/9/2008 2:53:48 PM , Rating: 5
You say that as if Chuck Norris won't be around in the 24th century...? I know for a fact that he could round-house Death in the face and survive.


RE: Unbreakable?
By PhoenixKnight on 10/9/2008 3:02:42 PM , Rating: 5
I'm pretty sure FIT has already been round-house kicked in the face for implying that Chuck Norris won't be around in the 24th century.


RE: Unbreakable?
By therealnickdanger on 10/9/2008 3:16:11 PM , Rating: 5
Chuck Norris exists outside of known time and space. Past, present, and future are one. Whether he round-housed you when you were a child, round-housed you today, or will round-house you 30 years from now, the result is the same: you die. FIT will meet his end at Chuck Norris's hands (or boot in this case) for his sacrilege, the "when" is irrelevant.


RE: Unbreakable?
By FITCamaro on 10/9/08, Rating: -1
RE: Unbreakable?
By PhoenixKnight on 10/9/2008 6:51:56 PM , Rating: 2
Exactly. And you're the one who pissed him off by assuming he wouldn't be around in the 24th century. Sucks to be you.


RE: Unbreakable?
By on 10/9/2008 10:39:10 PM , Rating: 2
the line of camaros could be around longer then you think ;)

"for each of us that dies, 2 more step up to take his place"


RE: Unbreakable?
By PhoenixKnight on 10/10/2008 12:42:44 AM , Rating: 2
Were you all formed when Chuck Norris roundhouse kicked FIT in the face, thus ripping apart the very fabric of reality and shattering the barriers between dimensions, causing versions of FIT from alternate dimensions to spill forth into this one? Sorta like the resonance cascade in Half Life, except with FITCamaros instead of head crabs and vortigaunts?


RE: Unbreakable?
By Motoman on 10/9/2008 5:02:43 PM , Rating: 5
Chuck Norris invented the spacetime rift by slamming 2 Bose-Einstein condensates together at superluminal speed with his thumb and pinky finger.


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