期刊名称：International Journal of Engineering and Computer Science
印刷版ISSN：2319-7242
出版年度：2013
卷号：2
期号：4
页码：956-961
出版社：IJECS
摘要：In this paper we have some modification in Playfair Cipher Substitution Technique. We have proposed a method to enhance the Playfair cipher for more secure and efficient cryptography. We use 8X8 Playfair cipher and have made use of a Simple Columnar Transposition Technique with Multiple Rounds in 8X8 Playfair Cipher Substitution Technique and arranged a special symbol by overall Character Frequency Analysis (CFA) .
关键词：Playfair Cipher; Simple Columnar Transposition Technique; Special Symbols; CFA
