Cryptology ePrint Archive: Report 2019/1380

Efficient Utilization of DSPs and BRAMs Revisited: New AES-GCM Recipes on FPGAs

Elif Bilge Kavun and Nele Mentens and Jo Vliegen and Tolga Yalcin

Abstract: In 2008, Drimer et al. proposed different AES implementations on a Xilinx Virtex-5 FPGA, making efficient use of the DSP slices and BRAM tiles available on the device. Inspired by their work, in this paper, we evaluate the feasibility of extending AES with the popular GCM mode of operation, still concentrating on the optimal use of DSP slices and BRAM tiles. We make use of a Xilinx Zynq UltraScale+ MPSoC FPGA with improved DSP features. For the AES part, we implement Drimer’s round-based and unrolled pipelined architectures differently, still using DSPs and BRAMs efficiently based on the AES Tbox approach. On top of AES, we append the GCM mode of operation, where we use DSP slices to support the GCM finite field multiplication. This allows us to implement AES-GCM with a small amount of FFs and LUTs. We propose two implementations: a relatively compact round-based design and a faster unrolled design.

Category / Keywords: implementation / hardware implementation, FPGA, AES-GCM, authentication codes, block ciphers, secret-key cryptography

Original Publication (with major differences): Proceedings of the International Conference on ReConFigurable Computing and FPGAs 2019

Date: received 30 Nov 2019

Contact author: e kavun at sheffield ac uk

Available format(s): PDF | BibTeX Citation

Note: Full version of the poster paper accepted at the International Conference on Reconfigurable Computing and FPGAs 2019 (ReConFig’19).

Version: 20191201:210141 (All versions of this report)

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