Financial Cryptography and Data Security
Volume 5143 of the series Lecture Notes in Computer Science pp 231-246
Fair Traceable Multi-Group Signatures
- Vicente BenjumeaAffiliated withComputer Science Dept., University of Malaga
- , Seung Geol ChoiAffiliated withComputer Science Dept., Columbia University
- , Javier LopezAffiliated withComputer Science Dept., University of Malaga
- , Moti YungAffiliated withGoogle Inc. & Computer Science Dept., Columbia University
Abstract
This paper presents fair traceable multi-group signatures (FTMGS), which have enhanced capabilities, compared to group and traceable signatures, that are important in real world scenarios combining accountability and anonymity. The main goal of the primitive is to allow multiple groups that are managed separately (managers are not even aware of the other ones), yet allowing users (in the spirit of the Identity 2.0 initiative) to manage what they reveal about their identity with respect to these groups by themselves. This new primitive incorporates the following additional features.
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While considering multiple groups it discourages users from sharing their private membership keys through two orthogonal and complementary approaches. In fact, it merges functionality similar to credential systems with anonymous type of signing with revocation.
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The group manager now mainly manages joining procedures, and new entities (called fairness authorities and consisting of various representatives, possibly) are involved in opening and revealing procedures. In many systems scenario assuring fairness in anonymity revocation is required.
We specify the notion and implement it in the random oracle model.
- Title
- Fair Traceable Multi-Group Signatures
- Book Title
- Financial Cryptography and Data Security
- Book Subtitle
- 12th International Conference, FC 2008, Cozumel, Mexico, January 28-31, 2008. Revised Selected Papers
- Pages
- pp 231-246
- Copyright
- 2008
- DOI
- 10.1007/978-3-540-85230-8_21
- Print ISBN
- 978-3-540-85229-2
- Online ISBN
- 978-3-540-85230-8
- Series Title
- Lecture Notes in Computer Science
- Series Volume
- 5143
- Series ISSN
- 0302-9743
- Publisher
- Springer Berlin Heidelberg
- Copyright Holder
- Springer-Verlag Berlin Heidelberg
- Additional Links
- Topics
- Industry Sectors
- eBook Packages
- Editors
- Authors
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- Vicente Benjumea (1)
- Seung Geol Choi (2)
- Javier Lopez (1)
- Moti Yung (3)
- Author Affiliations
-
- 1. Computer Science Dept., University of Malaga, Spain
- 2. Computer Science Dept., Columbia University, USA
- 3. Google Inc. & Computer Science Dept., Columbia University, USA
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