Design of Anonymous Attribute Authentication Mechanism

Shinsaku KIYOMOTO  Kazuhide FUKUSHIMA  Toshiaki TANAKA  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.4   pp.1112-1118
Publication Date: 2009/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.1112
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Internet Technology and its Architecture for Ambient Information Systems)
anonymous authentication,  attribute authentication,  self-blindable certificate,  untraceability,  

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Privacy remains an issue for IT services. Users are concerned that their history of service use may be traceable since each user is assigned a single identifier as a means of authentication. In this paper, we propose a perfectly anonymous attribute authentication scheme that is both unidentifiable and untraceable. Then, we present the evaluation results of a prototype system using a PC and mobile phone with the scheme. The proposed scheme employs a self-blindable certificate that a user can change randomly; thus the certificate is modified for each authentication, and the authentication scheme is unidentifiable and untraceable. Furthermore, our scheme can revoke self-blindable certificates without leaks of confidential private information and check the revocation status without online access.