A New Certificateless Signcryption Scheme Without Bilinear Pairing

The certificateless signcryption schemes have been explored in depth by many scholars because of minor calculation, do not require complicated certificate management and inexistence of key escrow problem. In recent years, many scholars promoted a large number of certificateless signcryption schemes, in which some schemes are insecure under the attack of replace several public keys. On this background, a new certificateless signcryption scheme was proposed, and the computation and security of our scheme was analyzed. The results show that our scheme is not only more secure than former schemes, but also has a lower calculation.