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Group signatures for hierarchical multigroups. (English) Zbl 0930.94041

Okamoto, Eiji (ed.) et al., Information security. 1st international workshop, ISW ’97, Tatsunokuchi, Ishikawa, Japan, September 17–19, 1997. Proceedings. Berlin: Springer. Lect. Notes Comput. Sci. 1396, 273-281 (1998).
Summary: At [Advances in Cryptology – Eurocrypt’91, Lect. Notes Comput. Sci. 547, 257-265 (1992; Zbl 0791.68044)] D. Chaum and E. Heyst introduced the notion of group signatures, which allow members of a group to make signatures on behalf of the group while remaining anonymous. This paper first presents a new type of group signatures for hierarchical multigroups. In group signatures for hierarchical multigroups, a user who is a member of a higher group is not only able to make a group signature of his higher group, but also able to make a group signature of a lower affiliated group without disclosing his higher membership, while the size of the secret data is independent of the number of the groups in which the user participates. Furthermore, if necessary, the group authority identifies a signer from the given group signature.
For the entire collection see [Zbl 0888.00019].

MSC:

94A62 Authentication, digital signatures and secret sharing
68P25 Data encryption (aspects in computer science)

Citations:

Zbl 0791.68044
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