Improving Security of Vigenère Cipher by Double Columnar Transposition

Sinha, Nishith and Kishore, B (2014) Improving Security of Vigenère Cipher by Double Columnar Transposition. International Journal of Computer Applications, 100 (14). ISSN 0975 – 8887

[img] PDF
KB_IJCA-2-Paper.pdf - Published Version
Restricted to Registered users only

Download (146kB) | Request a copy


Protecting data from malicious attacks during storage and transmission is the reason for using encryption. Encryption can be achieved by two methods – Transposition and Substitution. Transposition refers to changing the order of characters in a given text. On the other hand, substitution is the process of replacing each character of the plaintext with some other character. Using a combination of transposition and substitution for encryption leads to greater security when compared to using either of them separately. Vigenère Cipher is a poly-alphabetic cipher. It is based on the substitution technique which uses multiple substitution alphabets. In this paper, we introduce double columnar transposition on Vigenère Cipher to enhance its security making cryptanalysis difficult.

Item Type: Article
Uncontrolled Keywords: Transposition, Substitution, Poly-Alphabetic Cipher, Double Columnar Transposition
Subjects: Engineering > MIT Manipal > Computer Science and Engineering
Depositing User: MIT Library
Date Deposited: 14 Jan 2015 11:24
Last Modified: 14 Jan 2015 11:24

Actions (login required)

View Item View Item