Leakage-Resilient Certificateless Signcryption Scheme

Signcryplion has been adopted in several areas because it is more effificient than signature-then-encryption. In the actual application, to keep the original security, a cryptography primitive should withstand various leakage attacks, and the previous leakage-resilient certifificateless signcryption scheme contains true-simulation extractable non-interactive zero-knowledge argument, which makes the computation effificiency of the corresponding construction low. To further solve the above problem, we propose a leakage-resilient certificateless signcryption scheme which need not use any cryptographic primitives, and we can prove the security of proposed scheme based on the traditional complexity assumptions, such as discrete logarithm, decisional Diffifie-Hellman.