A novel substantial cipher against passive attacks using fuzzy logic based approach

Information security is essential for both people and organizations because it helps in protecting private and sensitive data from unwanted access. Modern encryption algorithms produce ambiguous cipher text, raising suspicion and resulting in passive attack like traffic analysis. Passive attacks occur when an attacker intercepts or eavesdrops on the communication between two parties without altering the contents of the message. A novel approach which generates substantial cipher text by employing fuzzy logic on the fuzzy set is proposed. A secret key is sent along with the meaningful cipher text by performing bit manipulation and transcoding operations. It helps in reducing the attackers’ suspicion of the data. Performance of the proposed system is evaluated against well-known algorithms like DES and AES.