Indian Journal of Science and Technology
Year: 2010, Volume: 3, Issue: 4, Pages: 459-462
Massoud Sokouti1 , Babak Sokouti2 , Saeid Pashazadeh1 and Leili Mohammad Khanli3*
1 Faculty of Electrical and Computer Engineering, University of Tabriz, Tabriz, Iran;
2 Faculty of Engineering, Islamic Azad University-Tabriz Branch, Tabriz, Iran;
3 Faculty of Mathematical Sciences, University of Tabriz, Tabriz, Iran.
The use of cryptography has become increasingly important in recent years. Currently there are several good methods for encryption like AES and DES. Both of these algorithms require several rounds to encrypt a relatively small block of data. Stream ciphers, like Vigenere and Caesar in particular, only require one round. The Vigenere and Caesar ciphers, however, can be easily broken. Improved version of the Vigenere algorithm is obtained by adding random bits of padding to each byte to diffuse the language characteristics and this make the cipher unbreakable. In this paper we will present an efficient method for hardware implementation of the improved Vigenere algorithm.
Keywords: Cryptography; Vigenere algorithm; FPGA.
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