Quantum mechanics creates location-based cryptography
By Alasdair Wilkins | io9.com
Imagine a form of encrypted communication so secure that it’s physically impossible to access it unless you’re actually at the location where you’re supposed to hear it. Quantum mechanics makes location-based cryptography possible - without any pesky codes or keys.
The basic idea is simple - create an encrypted communication where your actual physical location is the only key required to gain access to the hidden information. It would eliminate any need to create and store decryption keys, which is disproportionately the most complex and time-intensive task in cryptography. You could encrypt a secure line so that the only people who could ever hear would have to be at, say, two secure military bases, eliminating any chance of someone listening in from a third location.
And now computer scientists at UCLA have figured out how to do it. The big problem holding back location-based cryptography was that triangulation, the classical method of verifying the receiver’s location is the correct one, can be forged if enemies work together to provide just the right combination of wrong information. But that’s just classical physics - quantum mechanics has that problem solved. The solution lies in the no-cloning theorem, an outgrowth of the uncertainty principle that basically states it’s impossible to create an exact replica of a quantum state.
This means that, when the secure transmitter sends out multiple quantum bits, or qubits, the intended receiver is the only device that can verify the information and confirm they are who they say they are. If an adversary was trying to listen in, they’d still need multiple transmitters to mimic the supposed location, but that’s now physically impossible because the first adversary would need to both store the qubit’s state and send it on to the next confederate, and quantum mechanics says that’s impossible.
As the authors note in their abstract:
Therefore, our work shows that position-based quantum cryptography is one of the rare examples...for which there is such a strong separation between classical and quantum cryptography. Our results open a fascinating new direction for position-based security in cryptography where security of protocols is solely based on the laws of physics and proofs of security do not require any pre-existing infrastructure.
Article from: io9.com
Also tune into:
Nick Pelling - The Voynich Manuscript, Alan Turing and Ciphers
Nick Pelling - Deciphering of the Mysterious Voynich Manuscript
Jim Gardner - The Intelligent Universe, Bio-Cosm, ET, AI and Evolution
Two Centuries On, a Cryptologist Cracks a Presidential Code
Code Cracked! Cyber Command Logo Mystery Solved
Crop Circle with Binary Code (Video)
The Kryptos Code - The Code the CIA Can’t Crack
Wiltshire crop circle identified as symbolic code for first ten places of pi
Extended Awareness: The Possibilities of Quantum Consciousness
The quantum computer in your head
Quantum Communication (Video)
Is Quantum Mechanics Controlling Your Thoughts?
Privacy-Enhancing Technologies for Mobile Applications (Video)
Theory and Practice of Cryptography (Video)
Latest News from our Front Page
Pressure from the United Patriots Front Stops Mosque Plan
Pressure from the United Patriots Front appears to have killed off a mosque development in Narre Warren North.
The City of Casey council now looks likely to withhold planning approval for the development in a special meeting set for Tuesday night.
A council report, to be considered by councillors on Tuesday, recommends that the approval be blocked.
The mosque opponents’ cause has been helped by councillor ...
Police face questions over the influence of the Freemasons
South Yorkshire Police today face questions over whether powerful 'secret society' the Freemasons held sway over the force at the time of Hillsborough.
Families of victims say that officers who were Masons were promoted into powerful positions despite being ill-equipped, including match commander David Duckenfield.
Duckenfield told the fresh inquests he had been a Freemason since 1975 and became head of his ...
England Bans its Own Flag to Avoid Offending Muslims
St. George's Cross "racist" towards immigrants
Government officials said their city was ‘too multicultural’ to celebrate St George’s Day, England’s version of the 4th of July.
The council said that displaying the English flag may have been seen as “racist” towards immigrants.
Half of Western European men descended from one Bronze Age ‘king’
Half of Western European men are descended from one Bronze Age ‘king’ who sired a dynasty of elite nobles which spread throughout Europe, a new study has shown.
The monarch, who lived around 4,000 years ago, is likely to have been one of the earliest chieftains to take power in the continent.
He was part of a new order which emerged in ...
"Local Residents" Are Filmed Stealing Dozens of Bottles of Water at London Marathon Stop
Editor's Comment: "Local" residents? Why bother blurring their faces? We know who they are.
London marathon runners were robbed of dozens of bottled waters when thieves raided a refreshment area armed with trolleys during today's race.
Nearby residents - including parents with children - were captured on camera piling up crates of free water handed out by volunteers during the 26-mile event.
|More News » |