Quantum cryptography: No Signaling and quantum key distribution

Jul 05, 2005

A new research article outlines another aspect of Quantum Cryptography

In "No Signaling and quantum key distribution", a new paper published in Physical Review Letters 95 (010503 – 2005), Barrett, Hardy and Kent give the first example of a way of implementing quantum cryptography which is provably secure - even if quantum theory is incorrect, so long as a successor theory shares with quantum theory the features which make faster-than-light signaling impossible.

The scheme can be implemented by two parties (Alice and Bob) who know quantum theory but know nothing about the precise form of any successor theory, and is secure against a "post-quantum" eavesdropper, Eve, even if she knows the successor theory and has arbitrary post-quantum technology available to her.

Related link: Perimeter Institute for Theoretical Physics

Explore further: Nanoparticles in consumer products can significantly alter normal gut microbiome

Related Stories

First glimpse inside a macroscopic quantum state

Mar 27, 2015

In a recent study published in Physical Review Letters, the research group led by ICREA Prof at ICFO Morgan Mitchell has detected, for the first time, entanglement among individual photon pairs in a beam ...

We must defend science if we want a prosperous future

Mar 03, 2015

Today's Australians are, by far, the best educated cohort in our history –- on paper, anyway -– but this is not reflected in the quality of our political discourse. We appear to be lacking in courage, ...

Recommended for you

Implantable electrode coating good as gold

20 minutes ago

A team of researchers from Lawrence Livermore and UC Davis have found that covering an implantable neural electrode with nanoporous gold could eliminate the risk of scar tissue forming over the electrode's ...

Defects in atomically thin semiconductor emit single photons

20 hours ago

Researchers at the University of Rochester have shown that defects on an atomically thin semiconductor can produce light-emitting quantum dots. The quantum dots serve as a source of single photons and could be useful for ...

Many uses in researching quantum dots

23 hours ago

It's easier to dissolve a sugar cube in a glass of water by crushing the cube first, because the numerous tiny particles cover more surface area in the water than the cube itself. In a way, the same principle applies to the ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.