Robust and Efficient Dynamic Stream Cipher Cryptosystem

  • Abdullah Ayad Ghazi Department of Mathematics, College of Science, University of Baghdad, Baghdad, Iraq
  • Faez Hassan Ali Department of Mathematics, College of Science, Al-Mustansiryah University, Baghdad, Iraq
Keywords: Stream cipher, Dynamic stream cipher, Linear Feedback Shift Registers

Abstract

In this paper a new technique based on dynamic stream cipher algorithm is introduced. The mathematical model of dynamic stream cipher algorithm is based on the idea of changing the structure of the combined Linear Feedback Shift Registers (LFSR's) with each change in basic and message keys to get more complicated encryption algorithm, and this is done by use a bank of LFSR's stored in protected file and we select a collection of LFSR's randomly that are used in algorithm to generate the encryption (decryption) key.

We implement Basic Efficient Criteria on the suggested Key Generator (KG) to test the output key results. The results of applying BEC prove the robustness and efficiency of the proposed stream cipher cryptosystem.

Published
2018-06-27
How to Cite
GhaziA. A., & AliF. H. (2018). Robust and Efficient Dynamic Stream Cipher Cryptosystem. Iraqi Journal of Science, 59(2C), 1105-1114. Retrieved from http://scbaghdad.edu.iq/eijs/index.php/eijs/article/view/401
Section
Mathematics