A high level language implementation of the data encryption standard and a bit-slice architecture

This paper presents a high level language (HLL) implementation of the data encryption standard (DES) and discusses an implementation that employs a bit-sliced architecture. The HLL implementation was performed on Borland's Delphi4/sup TM/ language and proved to be highly valuable for obtaining the intermediate results that were required for debugging. The key objectives of this work were to make DES available for system applications written in fifth generation languages and also to discuss the design of a bit-sliced DES architecture suitable for applications requiring low silicon area.