Abstract
Cryptography is a type of art that translate strings of plain text into strings of cipher text and is very important in sharing of secrete information in communication system. It is very essential to have cryptographic algorithms to provide high security by utilizing optimum computational resources during information sharing to achieve data confidentiality, privacy, integrity and other security services. The traditional conventional encryption algorithms (DES, AES) have high computational cost due to generating number of sub keys and bilinear concept. Hence this paper propose the sequential state machine (Mealy state Machine) based cryptosystem which is very light weight in nature and provide high security due to its weakly invertability concept with relatively smaller key size. The paper also presents the performance analysis on proposed algorithm and describes the security analysis on it.
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