The quantum one-time pad in the presence of an eavesdropper

Details The quantum one-time pad in the presence of an eavesdropper The quantum one-time pad in the presence of an eavesdropper

2010-04-20

arxiv.org/abs/1004.3328v1

Phys. Rev. Lett. 108, 040504 (2012)

Physics

Quantum Physics

Scientific paper

10.1103/PhysRevLett.108.040504

A classical one-time pad allows two parties to send private messages over a public classical channel -- an eavesdropper who intercepts the communication learns nothing about the message. A quantum one-time pad is a shared quantum state which allows two parties to send private messages or private quantum states over a public quantum channel. If the eavesdropper intercepts the quantum communication she learns nothing about the message. In the classical case, a one-time pad can be created using shared and partially private correlations. Here we consider the quantum case in the presence of an eavesdropper, and find the single letter formula for the rate at which the two parties can send messages using a quantum one-time pad.

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