Cryptanalysis and Improvement of a Forward-Secure Digital Signature Scheme Based on Elliptic Curve
Tang Lei · Microelectronics & Computer · 2008
Through the security analysis of a proposed forward-secure digital signature scheme based on elliptic curve,this paper points out the scheme has security omission and no forward security.In this paper,a new forward-secure signature scheme based on elliptic curve by using the bilinear property of Weil pairing defined on elliptic curves is present,which is an effective improvement of the available scheme proposed by others.The security of the new scheme is based on the elliptic curve discrete logarithm problem of non-supersingular elliptic curve over finite field which has no efficient attack method by now.The new scheme has not only the features of forward-secure and resisting forging attack,but also certain theoretical and practical values.