Quantum state regeneration in entanglement based quantum key distribution protocols

Reinhard Erdmann

doi:10.1117/12.2051166

28 May 2014 Quantum state regeneration in entanglement based quantum key distribution protocols

Reinhard Erdmann

Proceedings Volume 9123, Quantum Information and Computation XII; 912303 (2014) https://doi.org/10.1117/12.2051166
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

Quantum Key Distribution (QKD) has been shown to be provably secure when certain idealized conditions are met in a physical realization. All implementations of QKD to date require non-orthogonal basis measurements to implement it; making it commonly assumed that measurement basis variation is fundamental to making QKD protocols secure from eavesdropping. We show here that in particular physical conditions this assumption is incorrect, and that provable security can be achieved without use of multiple bases. Basis setting information can in fact be shared with all potential eavesdroppers, as they are unable to use it to acquire or influence any part of the encryption key generation. Furthermore the key generation efficiency is limited to 100 % as compared with an inherent 50 % limit for alternating bases in BB84 or Entangled Ekert protocols.

Citation Download Citation

Reinhard Erdmann "Quantum state regeneration in entanglement based quantum key distribution protocols", Proc. SPIE 9123, Quantum Information and Computation XII, 912303 (28 May 2014); https://doi.org/10.1117/12.2051166

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