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Proceedings Article

Quantum three-pass cryptography protocol

[+] Author Affiliations
Li Yang

State Key Lab. of Information Security (China)

Ling-An Wu

Institute of Physics (China)

Songhao Liu

South China Normal Univ. (China)

Proc. SPIE 4917, Quantum Optics in Computing and Communications, 106 (September 11, 2002); doi:10.1117/12.483035
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From Conference Volume 4917

  • Quantum Optics in Computing and Communications
  • Songhao Liu; Guangcan Guo; Hoi-Kwong Lo; Nobuyuki Imoto
  • Shanghai, China | October 14, 2002


We present a new kind of quantum cryptography protocol based on Shamir's three-pass protocol of classical cryptography, which allows the transmission of qubits directly and secretly via the aid of an unjammable classical channel. In this protocol we implement the encryption and decryption transformations via rotations on the Poincare sphere of the photons polarization parameters. The key technique is that Bob's encryption rotation must be commutative with Alice s decryption rotation; this means that the axes of these two rotations must be parallel. We also present a security analysis of the protocol under a man-in-the-middle attack.

© (2002) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

Li Yang ; Ling-An Wu and Songhao Liu
"Quantum three-pass cryptography protocol", Proc. SPIE 4917, Quantum Optics in Computing and Communications, 106 (September 11, 2002); doi:10.1117/12.483035; http://dx.doi.org/10.1117/12.483035

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