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Quantum Cryptography Based on Split Transmission of One-Bit Information in Two Steps

1997; American Physical Society; Volume: 79; Issue: 12 Linguagem: Inglês

10.1103/physrevlett.79.2383

1092-0145

Masato Koashi, Nobuyuki Imoto,

Quantum Mechanics and Applications

We propose a simple quantum cryptographic scheme involving truly two orthogonal states. The security of the protocol is based on splitting the transfer of one-bit information into two steps, ensuring that only a fraction of the bit information is transmitted at a time. A particular implementation with an asymmetric interferometer is presented, which does not require the random timing of the packet sending as was used by Goldenberg and Vaidman [Phys. Rev. Lett. 75, 1239 (1995)].