Group blind digital signatures: A scalable solution to electronic cash | Zendy

Anna Lysyanskaya | Zendy; Zulfikar Ramzan | Zendy

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Group blind digital signatures: A scalable solution to electronic cash

Author(s) -

Anna Lysyanskaya,

Zulfikar Ramzan

Publication year - 1998

Publication title -

lecture notes in computer science

Language(s) - English

Resource type - Book series

eISSN - 1611-3349

pISSN - 0302-9743

ISBN - 3-540-64951-4

DOI - 10.1007/bfb0055483

Subject(s) - electronic cash , blind signature , group signature , computer science , group (periodic table) , construct (python library) , digital signature , scheme (mathematics) , theoretical computer science , computer security , anonymity , electronic money , identity (music) , blindness , scalability , public key cryptography , world wide web , payment , mathematics , computer network , encryption , database , hash function , mathematical analysis , chemistry , organic chemistry , medicine , optometry , physics , acoustics

In this paper we construct a practical group blind signature scheme. Our scheme combines the already existing notions of blind signa- tures and group signatures. It is an extension of Camenisch and Stadler's Group Signature Scheme (5) that adds the blindness property. We show how to use our group blind signatures to construct an electronic cash system in which multiple banks can securely distribute anonymous and untraceable e-cash. Moreover, the identity of the e-cash issuing bank is concealed, which is conceptually novel. The space, time, and com- munication complexities of the relevant parameters and operations are independent of the group size.

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