Quantum cryptography as a retrodiction problem

Details Quantum cryptography as a retrodiction problem Quantum cryptography as a retrodiction problem

2009-09-18

arxiv.org/abs/0909.3375v1

Phys. Rev. Lett. 103, 220504 (2009)

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.103.220504

We propose a quantum key distribution protocol based on a quantum retrodiction protocol, known as the Mean King problem. The protocol uses a two way quantum channel. We show security against coherent attacks in a transmission error free scenario, even if Eve is allowed to attack both transmissions. This establishes a connection between retrodiction and key distribution.

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