The study of cryptography has always had interesting research area. It is already known that security of data is the primary concerned in the public network. Encryption and decryption is the process of cryptography technique which should be provided secrecy of the data over the network. In the real world there are so many organizations working on large databases over a public network like the banking sector, so there the security is of prime concern. Encryption is exhaustively used to keep

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... dential data. Other than encryption, there are so many cryptography techniques like digital signature, digital time-stamping, digital certificates etc. Used for security purpose. But encryption is the most used technique where transactions take place continuously between users. This paper has suggested new block cipher encryption algorithm. Suggested algorithm is the combination of different type of operation (logical and mathematical) to perform encryption. To calculate the performance of the suggested algorithm, the two parameters were used; these parameters are avalanche effect and execution time. The results achieved by applying the proposed technique show better performance of the algorithm as compared existing algorithm.