Date Added: Jul 2012
Cryptography is the art and science of achieving security by encoding message to make them non-readable. There are many techniques to encrypt plaintext and convert it to the cipher text. There are two primary ways in which a plaintext message can be codified to obtain the corresponding cipher text : substitution and transposition. Earlier, the authors developed few transposition techniques. In this paper, they have to attempt to enhance those techniques and made them more advanced. One of the most important things is that all the old techniques such as rail fence and simple columns are key-based and the key is in, any sequence or in any order to encrypt the plaintext.