Improvement of a Lattice-based Signature Scheme
نویسندگان
چکیده
Recently, Boyen at PKC 2010 proposed a lattice-based signature scheme in the standard model. In this paper, we show that his signature scheme does not satisfy strong unforgeability. In other words, an adversary can produce a new signature for a message M after seeing a signature of the message M. Then we present an improved scheme and prove that the improved scheme satisfies strong unforgeability. Furthermore, the improved signature scheme is as efficient as Boyen’s signature scheme.
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