A Hybrid Symmetric Key Cryptography Method to Provide Secure Data Transmission

Abstract

Confidentiality of data is required when it travels over the insecure network such as e-mail transfer using Pretty Good Privacy (PGP), image transfer, etc. The proposed symmetric cryptographic algorithm is suitable for such data transfer. A number of other algorithms can be formulated by combining the existing algorithms to incorporate the algorithms in the relevant applications. The modified algorithm for session key generation is a combination of Affine cipher and hill cipher. A systematic study of the symmetric-key algorithm consisting of multiple keys with regular dependency has been carried out in order to show the efficacy. Security analysis of the proposed algorithm reveals the weakness of the algorithm.