Send to

Choose Destination
Phys Rev Lett. 2006 Sep 22;97(12):120405. Epub 2006 Sep 20.

From Bell's theorem to secure quantum key distribution.

Author information

ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.


The first step in any quantum key distribution (QKD) protocol consists of sequences of measurements that produce correlated classical data. We show that these correlation data must violate some Bell inequality in order to contain distillable secrecy, if not they could be produced by quantum measurements performed on a separable state of larger dimension. We introduce a new QKD protocol and prove its security against any individual attack by an adversary only limited by the no-signaling condition.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center