Ever since the internet was employed for commercial applications, it has become unsafe place for exchanging data. The mission critical data of any organization needs a security mechanism which can guard against malicious attacks. Most of these security problems are intentionally caused by notorious people trying to gain some financial benefit or harm someone. Every organization utilizes some kind of safety measures to avoid access to unauthorized users like firewalls, proxy servers, access lists, antiviruses etc. Other important application layer security mechanisms that are widely used are cryptography and steganography. Steganography can be described as the technique for hiding a secret message within a larger one such that no one except the sender and receiver suspects the contents or even the existence of the hidden message. On the contrary, cryptography deals with altering the message contents such that they become meaningless if anyone intercepts them while transmission. In this paper, a novel text cryptographic algorithm named FBC Cryptosystem have been proposed for meeting the requirements of secure data transfer. The proposed algorithm is also compared to the de-facto encryption standards to foresee its performance and security aspects. It is found out that the proposed algorithm is a secure and proficient way for data encryption.

Cryptography Decryption Encryption Key Feistel Based Cryptosystem Symmetric key algorithm