Cryptology ePrint Archive: Report 2019/1118

A Diffie-Hellman quantum session key establishment protocol without entanglement

Yalin Chen and Chang Hsiang and Liang-Chun Wang and Yu-Yuan Chou and Jue-Sam Chou *

Abstract: In 2016 and 2017, Shi et al first proposed two protocols for the communication parties to establish a quantum session key. Both work by rotating the angle of one communicator’s private key on the other party's quantum public key. In their approaches, the session key shared by each pair of communicators is fixed after the key generation phase. Thereafter, the key used in each communication does not change, but for security consideration, the session key should be changed in every time usage. In other words, those key agreement protocols do not satisfy the requirement of key security. In view of this, this paper develops a quantum session key establishment based on the Diffie-Hermann style key exchange to produce different quantum session keys in each communications. After analysis, we confirm that our method can resist various attacks and is therefore secure.

Category / Keywords: public-key cryptography / Diffie-Hellman key agreement, session key, quantum asymmetric cryptography, man-in-the-middle attack

Date: received 30 Sep 2019

Contact author: jschou at nhu edu tw, jschou at mail nhu edu tw

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Version: 20191001:151247 (All versions of this report)

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