An efficient algorithm for Polyalphabetic substitution using random tables

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Data is the heart of all organizations so data security remains the biggest concern for application customers Data needs to be handled securely at all stages, from transmission, computation and persistence. Nowadays the use of internet and mobile technology continues to rise in emerging markets. Thus there is a growing concern for privacy and data security. In today"s world there are many applications such as secret message transferring in military systems, payments to private organisations, personal emails, data storage in personal devises and secure exchange of password, where the information security issues are more challenging and complex [2-6]. One of the methods for ensuring security is cryptography deals with hiding the real information