Faked state attacks on realistic round robin DPS quantum key distribution systems and countermeasure

T. Iwakoshi

doi:10.1117/12.2176770

7 May 2015 Faked state attacks on realistic round robin DPS quantum key distribution systems and countermeasure

T. Iwakoshi

Proceedings Volume 9505, Quantum Optics and Quantum Information Transfer and Processing 2015; 950504 (2015) https://doi.org/10.1117/12.2176770
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

Abstract

In May 2014, a new quantum key distribution protocol named “Round Robin Differential-Phase-Shift Quantum Key Distribution (RR DPS QKD)” was proposed. It has a special feature that the key consumption via privacy amplification is a small constant because RR DPS QKD guarantees its security by information causality, not by information-disturbance trade-off. Therefore, the authors claimed that RR DPS QKD systems does not need to monitor the disturbance by an attacker in the quantum channel. However, this study shows that a modified Faked-State Attack (or so-called bright illumination attack) can hack a RR DPS QKD system almost perfectly if it is implemented with realistic detectors even information-causality guarantees the security of RR DPS QKD protocol. Therefore, this study also proposes a possible Measurement-Device-Independent RR DPS QKD system to avoid the modified Faked-State Attack.

Citation Download Citation

T. Iwakoshi "Faked state attacks on realistic round robin DPS quantum key distribution systems and countermeasure", Proc. SPIE 9505, Quantum Optics and Quantum Information Transfer and Processing 2015, 950504 (7 May 2015); https://doi.org/10.1117/12.2176770

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