SMS4密码算法的低功耗实现

摘要

根据实际应用场景,提出一种SMS4密码算法的低功耗实现方法.通过对前后分组加解密数据的密钥进行对比分析,有选择地对上一次操作结果进行复用,同时辅以动态时钟管理、操作数隔离、门控时钟等低功耗设计技术降低功耗.实验结果表明,该实现方法比原算法降低65％的功耗,等效门数减少13％.%Combined with the characteristic and practical working condition of SMS4 cipher algorithm, this paper proposes its low consumption implementation method. By comparative analyzing the secret keys of the front and back grouping encryption deciphering data, selectively reuse the previously generated intermediate data. Combined with dynamic clock switching, operator isolation, gated clock as well as other lower consumption design technic, the power consumption is greatly reduced. Experimental result shows that, this implementation method compared with the original algorithm, the consumption reduces by 65%, and equivalent door number reduces by 13%.