Design of ECC-Based ElGamal Encryption Scheme Using CL-PKC

Abstract

Owing the advantages of Elliptic Curve Cryptography (ECC), we proposed a Certificateless Public Key Cryptosystem (CL-PKC)-based ElGamal Encryption (CL-EE) scheme using ECC in this paper. In literature, ECC-based ElGamal Encryption scheme is devised using Certificate Authority-based Public Key Cryptography (CA-PKC) that needs a global Public Key Infrastructure (PKI) to maintain the public keys and certificates. Moreover, in PKI architecture, the sender must have the additional ability to verify the public key certificate of the receiver. It is known that CL-PKC avoids public key certificate and thus, our CL-EE scheme is more efficient than PKI-based ElGamal Encryption scheme. We simulated our scheme using AVISPA (Automated Validation of Internet Security Protocols and Applications) tool and the results demonstrated that the scheme is secure against both active and passive attacks.KeywordsElliptic curve cryptographyCertificateless cryptosystemElGamal encryptionPublic key infrastructureAVISPA software