【摘要】 高级加密标准(AES)加密被众多无线传感器网络(WSN)标准定义为其数据链路层的核心密码算法。传统AES实现由于计算复杂度高,难以在资源受限的WSN节点上实现。通过查找表可以大幅提高AES软件实现的加密速度,但是传统的基于4张1kB查找表的AES实现(4-T)不仅存储开销大,而且面临着访问驱动Cache攻击的威胁。通过对查找表的结构进行优化,提出一种基于单张512B查找表的AES实现方法(1-T),在降低存储开销的同时,提高了AES实现抵抗访问驱动Cache攻击的能力。此外,通过对轮加密公式的优化,减小了对加密速度的影响。在ARM平台上的实验显示,1-T实现的加密时间相比4-T增加43.5%,但仅是采用硬件加速器AES实现的加密时间的38.55%。更多还原

【Abstract】 Advanced encryption standard(AES)is specified as the core cipher algorithm of the data link layer by many wireless sensor network(WSN)standards.But traditional AES implementation is hard to perform on the resource-constrained WSN nodes due to its high computation complexity.Look-up table(LUT)can improve the speed of AES software implementations significantly,but the traditional AES implement(4-T)based on 4LUTs consumes high storage and faces the threat of access-driven cache attack.This paper proposed an AES implementation(1-T)based on one 512-Byte LUT,by optimizing the structure of the LUT,decreasing its storage consumption and increasing its ability of against access-driven cache attack significantly at the same time.In order to eliminate the encryption speed impact on1-T,the round encryption function of 1-T was optimized as well.The experiment result on ARM shows that,the 1-T’s encryption time is increased 43.5% comparing to 4-T’s,but only 38.55% of the one of the AES implementation based on hardware accelerator.更多还原