International Association of Scientific Innovation and Research (IASIR)
RSA cryptosystem is the most commonly used public key cryptosystem. It is the first public key cryptosystem. The strength of this cryptosystem is based on the larger key size. There are many algorithms and variants of RSA. But, it is steal a burning topic of research. Because the thrust to store data secret is never going to end. In this paper, the authors have proposed a literature review of some modern variants of the RSA algorithm. All the algorithms have been analyzed. Their merits and demerits are also discussed.