Enhancing the security in RSA and elliptic curve cryptography based on addition chain using simplified Swarm Optimization and Particle Swarm Optimization for mobile devices

Security is the major concern in mobile or portable devices because the internet community can do their work at any time at any place at anywhere. Today various cryptographic algorithms like RSA, Elliptic Curve Cryptography (ECC), etc., can be used to protect the information in mobile devices. But, they have some limitations viz., energy, battery power, processing speed, operating systems, screen size, resolution, memory size, etc. Providing security for limited power mobile devices is a challenging task. RSA and ECC are normally used in mobile devices. In RSA, both encryption and decryption are of the form xe mod n and in ECC, the scalar point k[P] where k is a scalar and P is a point in EC plays a vital role in performing encryption and decryption. The point arithmetic involved in ECC is a power starving process. To speed up the operations in both cryptographic algorithms, addition chains (AC) are normally used. If the encryption and decryption time get reduced, it ultimately reduces the power consumption. There are several AC algorithms exist in the literature. But, ACs are generated using Particle Swarm Optimization and Simplified Swarm Optimization are proposed in this paper and they are used in the said processes of RSA and ECC with two android and window emulators. The processing time, power consumption taken for encryption, decryption process and security of the said algorithms are also analysed. © 2020, Bharati Vidyapeeth's Institute of Computer Applications and Management.