ENHANCING SECURITY OF CAESAR CIPHER USING DIFFERENT METHODS

Anupama Mishra

Abstract: Cryptography is an art and science of converting original message into non readable form. There are two techniques for converting data into no readable form:1)Transposition technique 2)Substitution technique. Caesar cipher is an example of substitution method. As Caesar cipher has various limitations so this talk will present a perspective on combination of techniques substitution and transposition. In this paper I have focused on the well known classical techniques the aim was to induce some strength to these classical encryption for that purpose I blended classical encryption with the some more techniques. my proposed method showed that it is better in terms of providing more security to any given text message. In our experiments I took Caesaer Ciphers as representatives of Classical Techniques. To make it more secure I have used some techniques like I have used multiple level Row Transposition Ciphers, encryption with same key at each level and encryption with different key at each level.

Keywords: substitution, transposition, cryptography, Caesar cipher

DOI: https://doi.org/10.15623/ijret.2013.0209049