Design of Proxy Signature in ECDSA
Ming-Hsin Chang, I-Te Chen, Ming-Te Chen · 2008
DSA and ECDSA are two standard signatures, which have been fully discussed and well accepted. However, they both lack functionality of proxy signature. On the other hand, most of the proxy signature schemes, which have been proposed prior to this date, are seldom based on standard signatures. Consequently, most proxy signature schemes have been considered infeasible due to obvious security weaknesses. In this work, we propose a proxy-protected signature scheme based on ECDSA to satisfy the basic properties of partial delegation proxy signature described by Mambo et al. as well as strong proxy signature properties defined by Lee et al. Moreover, an example of practical usage of the proposed schemes is offered.