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Achieving Strong Security and Member
Registration for
1Graduate School of Science and Engineering, Saitama University, Saitama, Japan perera.m.n.s.119@ms.saitama-u.ac.jp 2 Faculty of
Education and Integrated Arts and Sciences, Waseda
University, Tokyo, Japan tkoshiba@waseda.jp Abstract A fully dynamic group signature scheme with member
registration and member revocation with strong security is desirable when
using group signatures in real life. Langlois,
Ling, Nguyen, and Wang (PKC 2014) presented the first lattice-based group
signature scheme with member revocation. Even though their scheme employs the
most flexible evocation approach called Verifier-local revocation, their
scheme relied on a weaker security notion and did not provide a member
registration mechanism. In this paper, we obtain a fully dynamic group signature
scheme by proposing a group joining protocol to their scheme. Moreover we
discuss the difficulties of achieving both fully-dynamicity and strong
security at the same time and provide a scheme with solutions for those
difficulties. Keywords: Lattice-Based Group Signatures,
Verifier-Local Revocation, Member Registration, +: Corresponding author: Maharage
Nisansala Sevwandi Perera Journal of Internet Services and Information
Security (JISIS), 8(4):
1-15, November 2018 |