Abstract

. FPGA based data encryption provides greater flexibility than ASICs and higher performance than software. Because FPGAs can be reprogrammed, they allow a single integrated circuit to efficiently implement multiple encryption algorithms. Furthermore, the ability to program FPGAs at runtime can be used to improve the performance through dynamic optimization. This paper describes the application of partial evaluation to an implementation of the Data Encryption Standard (DES). Each end user of a DES session shares a secret key, and this knowledge can be used to improve circuit performance. Key-specific encryption circuits require fewer resources and have shorter critical paths than the completely general design. By applying partial evaluation to DES on a Xilinx XC4000 series device we have reduced the CLB usage by 45% and improved the encryption bandwidth by 35%. 1. Introduction As the volume of digital communications increases, reliable encryption becomes more important in order to ens...

Citations