Heterogeneous Identity-based to certificate less online/offline signcryption
Benjamin Klugah‐Brown, Anthony Mackitz Dzisoo, Abigail Akosua Addobea · 2015
This paper investigates current heterogeneous signcryption and proposes an efficient online/offline heterogeneous signcryption scheme which provides confidentiality and authentication to achieve security goals in secure communication. The proposed efficient signcryption scheme can simultaneously achieve confidentiality, integrity, authentication, and nonrepudiation in a logical single step. The scheme requires that a sender in an identity-based cryptosystem (IBC) to send a message to a receiver in a certificateless cryptosystem (CLC). The scheme is proved to have indistinguishability against adaptive chosen ciphertext attacks (IND-CCA2) under the bilinear Diffie-Hellman and existential unforgeability against adaptive chosen messages attacks (EUF-CMA) under the DiffieHellman problem in the random oracle model. The computational time and communication cost was determined through the implementation of the proposed scheme.