DSH: Deniable secret handshake framework

Authors

Yangguang Tian, Singapore Management UniversityFollow
Yingjiu Li, Singapore Management University
Yinghui Zhang, Singapore Management University
Nan Li, University of NewcastleFollow
Guomin Yang, University of WollongongFollow
Yong Yu, Shaanxi Normal UniversityFollow

RIS ID

130892

Publication Details

Tian, Y., Li, Y., Zhang, Y., Li, N., Yang, G. & Yu, Y. (2018). DSH: Deniable secret handshake framework. Lecture Notes in Computer Science, 11125 341-353. 14th International Conference, ISPEC 2018, Tokyo, Japan, September 25-27, 2018, Proceedings

Abstract

Secret handshake is a useful primitive that allows a group of authorized users to establish a shared secret key and authenticate each other anonymously. It naturally provides a certain degree of user privacy and deniability which are also desirable for some private conversations that require secure key establishment. The inherent user privacy enables a private conversation between authorized users without revealing their real identities. While deniability allows authorized users to later deny their participating in conversations. However, deniability of secret handshakes lacks a comprehensive treatment in the literature. In this paper, we investigate the deniability of existing secret handshakes. We propose the first generic framework that converts any secret handshake protocols into fully deniable ones. In particular, we define two formal security models, including session key security and deniability for our proposed framework.