A fast pipelined multi-mode DES architecture operating in IP representation

The Data Encryption Standard (DES) is a cipher that is still used in a broad range of applications, from smartcards, where it is often implemented as a tamperresistant embedded co-processor, to PCs, where it is implemented in software (for instance to compute crypt(3) on UNIX platforms.) To the authors’ knowledge, implementations of DES published so far are based on the straightforward application of the NIST standard. This article describes an innovative architecture that features a speed increase for both hardware and software implementations, compared to the state-of-the-art. For example, the proposed architecture, at constant size, is about twice as fast as the state-of-the-art for 3DES-CBC. The first contribution of this article is an hardware architecture that minimizes the computation time overhead caused by key and message loading. The second contribution is an optimal chaining of computations, typically required when “operation modes” are used. The optimization is made...

• Type: Journal
• Year: 2007
• Where: INTEGRATION
• Authors: Sylvain Guilley, Philippe Hoogvorst, Renaud Pacalet
• Keywords: Data Encryption Standard, INTEGRATION 2007, Ip Representation, Tamperresistant Embedded Co-processor