91 Security Mediated Certificateless Signatures in the Standard Model

Security-mediated certificateless (SMC) signature not only addresses the issues about instantaneous revocation of keys in certificateless signature (CLS) but also resolves the key escrow problem in identity-based signature (IBS). In this paper, based on Waters’ signature scheme [15], Paterson et al.’s IBS scheme [13] and Xiong et al.’s CLS scheme [18], we propose a SMC signature scheme which is secure against malicious-but-passive KGC attack in the standard model.