An efficient certificateless signcryption in the standard model
Xiao Zheng, Xudong Li · 2016
Signcryption is a useful cryptography technology which can offers simultaneously both the functions of encryption and signature in a logic step, is more efficient than traditional sign-then-encrypt way. Recently Lin et al. proposed a certificateless signcryption in the standard model. In the paper, we propose a new scheme and prove more efficient than Lin et al.'s scheme in terms of security, our scheme combine S.Sharmila's identity signcryption and certificateless signcryption. Our scheme possesses public ciphertext verifiability and satisfies indistinguishable against adaptive chosen ciphertext attacks (IND-CCA) under the decision bilinear Diffie-Hellman (DBDH) and existentially unforgeable against chosen message attacks (EUF-CMA) under computational Diffie-Hellman (CDH) problems assumption.