A new approach on discrete chaotic cryptography using TMS320C6713 digital signal processors

This paper presents an algorithm for secure transmission of message by combining chaotic systems with stream ciphers for digital communication. To develop this chaotic cryptographic algorithm, one of the simplest discrete chaotic maps called Henon map has been used. A Texas Instrument's floating point Digital Signal Processor TMS320C6713 is used to program the proposed chaotic cryptographic algorithm. The Texas Instruments Digital Signal Processor possesses characteristics that are well suited for this kind of chaotic cryptographic algorithm and it has 32-bit word size. This paper is organized into five parts. The first section provides a short introduction to stream ciphers with the implementation of discrete chaotic maps on TMS320C6713 Digital Signal Processors. The second section describes some salient architectural features of the TMS320C6713. The third section deals with the synchronization of chaos system to achieve a good security performance. In the fourth section, an algorithm using discrete chaotic maps for secure communications is introduced. And finally, the implementation of the proposed chaotic encryption algorithm using Digital Signal Processors and the results are discussed.