Power efficiency evaluation of block ciphers on GPU-integrated multicore processor

Abstract

Computer systems with discrete GPUs are expected to become the standard methodology for high-speed encryption processing, but they require large amounts of power consumption and are inapplicable to embedded devices. Therefore, we have specifically examined a new heterogeneous multicore processor with CPU-GPU integration architecture. We first implemented three 128-bit block ciphers (AES, Camellia, and SC2000) from several symmetric block ciphers in an e-government recommended ciphers list by CRYPTREC in Japan using OpenCL on AMD E-350 APU with CPU-GPU integration architecture and two traditional systems with discrete GPUs. Then we evaluated their respective power efficiencies. Result showed that performance per watt of AES-128 on the APU including 80 cores were 743.0 Mbps/W and 44.0 % increases compared with those on a system equipped with a discrete AMD Radeon HD 6770 including 800 cores. This paper is the first to describe a study to evaluate the per-watt performance of block ciphers on GPUs. © 2012 Springer-Verlag.