TITLE:
On the Security of Quantum Key Distribution Ping-Pong Protocol
AUTHORS:
Masakazu Yoshida, Takayuki Miyadera, Hideki Imai
KEYWORDS:
Two-Way Quantum Key Distribution; Ping-Pong Protocol; Robustness; Information Disturbance Theorem
JOURNAL NAME:
Journal of Quantum Information Science,
Vol.3 No.1,
March
29,
2013
ABSTRACT: Computational based cryptography might not guarantee long term security if computational algorithms, computers, and so on are made remarkable progress. Therefore, quantum cryptography with unconditionally security attracts attention. In this paper, we consider security of a two-way quantum key distribution protocol, so called Ping-Pong protocol. As a result, we introduce not only robustness but also a different information disturbance theorem, which denotes a trade-off relationship between information gain for an eavesdropper and error rate, from the related works for an attack model.