Anonymous traceable disclosure scheme using pairing over elliptic curve

Authors:
Tadahiko Ito;Takeshi Okamoto;Atsuo Inomata;Eiji Okamoto
Affiliations:
University of Tsukuba, Tsukuba, Japan;University of Tsukuba, Tsukuba, Japan;Japan Science and Technology Agancy, Minato-ku Atago, Japan;University of Tsukuba, Tsukuba, Japan
Venue:
InfoSecu '04 Proceedings of the 3rd international conference on Information security
Year:
2004

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Abstract

Anonymity can protect a user's privacy, however it is hard to manage. It is hard to disclose anonymously. In addition, it is also hard to make people trust anonymous information. In this paper, we provide a key exchange scheme for not only anonymous, but also traceable disclosure. To be more precise, one who provides information can anonymously guarantee communication with particular person. Furthermore, his anonymity can be retained even if he discloses communication contents. These features can not realized by using signature scheme, or any other existing methods. Our method enable those features, and it can be useful when a group is dealing with confidential information.