New efficient certificateless signature scheme
Ya-ning HAN · Computer Engineering and Applications Journal · 2010
For eliminating the management and transfer of certificates in public key cryptosystem,and avoiding the inherent key escrow in identity-based cryptosystem,the concept of certificateless public key cryptosystem is introduced.In this paper,a new efficient certificateless signature scheme from bilinear pairing is presented.The signing algorithm needs one exponentiation computation,the verification algorithm only needs two pairings computation.Furthermore,the security relies on the hardness of the CDH problem and Inverse-CDH problem.Under the random oracle model,the new scheme is proved to be secure against existential forgery on adaptively chosen message attack.