Abstract
We initiate the study of unique group signature such that signatures of the same message by the same user will always have a large common component (i.e., unique identifier). It enables an efficient detection algorithm, revealing the identities of illegal users, which is fundamentally different from previous primitives. We present a number of unique group signature schemes (without random oracles) under a variety of security models that extend the standard security models of ordinary group signatures. Our work is a beneficial step towards mitigating the well-known group signature paradox, and it also has many other interesting applications and efficiency implications.
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Franklin, M., Zhang, H. (2012). Unique Group Signatures. In: Foresti, S., Yung, M., Martinelli, F. (eds) Computer Security – ESORICS 2012. ESORICS 2012. Lecture Notes in Computer Science, vol 7459. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33167-1_37
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