Date Added: Feb 2012
This paper elaborates polybit shuffling encryption and decryption algorithm based on N Dimensional encryption-decryption matrix which is an attempt to improve over the Classical Playfair Cipher. The unique feature of this algorithm is that it retains the simplicity of Classical Playfair Cipher but increases the robustness against crypto-attack by many folds. Moreover this algorithm can be used on any type of files as it is capable of encrypting binary files because this algorithm, instead of using characters, uses chunks of several bits or bytes to represent data values. The proposed polybit encryption and decryption algorithm uses an N-Dimensional encryption-decryption matrix.