New Zero-knowledge Undeniable Signatures - Forgery of Signature Equivalent to Factorisation

We propose a new zero-knowledge undeniable signature scheme which is based on the intractability of computing high-order even powers modulo a composite. The new scheme has a number of desirable properties: (i) forgery of a signature (including existential forgery) is proven to be equivalent to factorisation, (ii) perfect zero-knowledge, (iii) efficient protocols for signature verification and non-signature denial: both measured by $O(\log k)$ (multiplications) where $1/k$ bounds the probability of error. For a denial protocol, this performance is unprecedented

New zero-knowledge undeniable signatures Forgery of signature equivalent to factorisation

SIGLEAvailable from British Library Document Supply Centre-DSC:4335.26205(2001-36) / BLDSC - British Library Document Supply CentreGBUnited Kingdo