为防止差分功耗分析攻击，SM4加密算法添加了随机掩码，利用随机掩码打乱了结果数据和功耗的相关性，从而实现抗差分功耗分析攻击的能力。-To prevent the differential power analysis attack, SM4 encryption algorithm adds random mask mask disrupted by random correlation result data and power, enabling resistance to differential power analysis attacks.