Quantum Key Distribution Using Three Basis States

Details Quantum Key Distribution Using Three Basis States Quantum Key Distribution Using Three Basis States

1999-02-09

arxiv.org/abs/quant-ph/9902038v3

Pramana 54:709-713,2000

Physics

Quantum Physics

6 pages

Scientific paper

This note presents a method of public key distribution using quantum communication of n photons that simultaneously provides a high probability that the bits have not been tampered. It is a three-state variant of the quantum method of Bennett and Brassard (BB84) where the transmission states have been decreased from 4 to 3 and the detector states have been increased from 2 to 3. Under certain assumptions regarding method of attack, it provides superior performance (in terms of the number of usable key bits) for n < 18 m, where m is the number of key bits used to verify the integrity of the process in the BB84-protocol.

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