LiCi密码的差分故障攻击

LiCi轻量级分组密码算法是2017年提出的一种新型密码算法,其具有结构微小、消耗能量少等优点,适用于物联网等资源受限的环境.在LiCi的设计文档中,对该算法抵御差分攻击和线性攻击的能力进行了分析,但LiCi算法对于差分故障攻击的抵抗能力尚未得到讨论.针对LiCi算法每轮迭代的移位规律,在第31轮迭代时的左半侧多次注入...

Differential fault attack on LiCi cipher

LiCi lightweight block cipher is a new algorithm proposed in 2017.With advantages of small structure and low energy consumption,LiCi is more suitable for resource-constrained environments such as the internet of things(IoT).In the design document of LiCi,the ability of LiCi algorithm to resist differential attack and linear attack is analyzed,but the resistance of LiCi algorithm to differential fault attack has not been discussed.According to the permutation law of each round iteration of LiCi algorithm,32-bit key can be recovered by injecting a single bit fault into the left half of the 31st round iteration combined with its differential property.According to the key choreography scheme of the LiCi algorithm,the same differential fault attack was performed on iterations 30th,29th,28th,27th and 26th round to recover all the original keys.The attack requires a total of 48-bit faults,and the computational complexity is 232,which indicates the LiCi algorithm is difficult to resist differential fault attacks.