[Resource Topic] 2002/017: The Cramer-Shoup Strong-RSA Signature Scheme Revisited

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The Cramer-Shoup Strong-RSA Signature Scheme Revisited

Authors: Marc Fischlin


We discuss a modification of the Cramer-Shoup strong-RSA signature
scheme. Our proposal also presumes the strong RSA assumption (and a
collision-intractable hash function for long messages), but -without
loss in performance- the size of a signature is almost halved
compared to the original scheme. We also show how to turn the
signature scheme into a “lightweight” anonymous (but linkable)
group identification protocol without random oracles.

ePrint: https://eprint.iacr.org/2002/017

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