Triple encryption of multiple keys for symmetric key crypto systems

Multiple encryptions in a practical system refers to encrypting the data more than once i.e., encrypting the data twice or trice to increase the security levels. As long as the cipher is unbreakable the encryption schemes remains strong. In view of the known attacks encrypting the data more than once will strengthen the security levels. In this paper we proposed a triple encryption scheme by using two keys generated by the mathematical structures from the number-theoretic concepts.