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Title:
A Group Signature Scheme from Lattice Assumptions
Authors: S. Dov Gordon, Jonathan Katz, Vinod Vaikuntanathan
Abstract:Group signature schemes allow users to sign messages on behalf of a group while (1) maintaining anonymity (within that group) with respect to an observer, yet (2) ensuring traceability of a signer (by the group manager) when needed. In this work we give the first construction of a group signature scheme based on lattices (more precisely, the learning with errors assumption), in the random oracle model. Toward our goal, we construct a new algorithm for sampling a random superlattice of a given modular lattice together with a short basis, that may be of independent interest.
ePrint: https://eprint.iacr.org/2011/060
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