Efficient certificateless signcryption scheme

TLDR: This paper presents an efficient certificateless signcryption scheme, which only requires one pairing operation in the signc encryption phase and three pairing operations in the unsigncryption phase, and satisfies confidentiality, unforgeability and public verifiability.

Abstract: Certificateless cryptography not only overcomes the certificate management problems in the traditional public key cryptosystems,but also solves the key escrow problems in identity-based cryptosystemsSigncryption scheme combines the functionality of public key encryption and digital signature,which can realize the confidentiality and unforgeability of message simultaneouslyThis paper presents an efficient certificateless signcryption scheme,which only requires one pairing operation in the signcryption phase and three pairing operations in the unsigncryption phaseWith comparison to the existing schemes,the efficiency of the scheme is betterFor security requirements,this new scheme satisfies confidentiality,unforgeability and public verifiability