Ciphering algorithms in MicroBlaze-based embedded systems

The authors present different alternatives to increase the performance of ciphering algorithms in embedded systems based on MicroBlaze, a soft-core processor especially designed for Xilinx field programmable gate arrays. Several implementations of the most usual cryptographic algorithms have been developed for comparison purposes. The architectural options offered by MicroBlaze, together with the different choices to connect custom-accelerating cores, are considered. Without a great design effort, an improvement reaching two orders of magnitude over all-software solutions could be obtained.