Real Time Hardware Crypto Cards Based on DSP

Securing data in communication systems is the most common real-life cryptographic problem. Basic security services require both encryption and authentication. Modern public-key cryptography depends on a handful of algebraic problems, trying to achieve the best possible security while remaining extremely efficient and practical. This paper is concerned with the implementation of public key encryption algorithm on a Texas Instruments TMS320C31 Digital Signal Processor. The implemented algorithm is fully capable of ciphering and then deciphering real time data using floating-point arithmetic. After coding, debugging and compiling, code has been downloaded in flash of development board. Both the software and hardware integration are then successfully tested using a custom developed hardware system.