在FPGA平台上,利用降低电源电压的方法使电路关键路径上的数据建立失败,从而达到注入故障的目的。基于合适的故障模型,攻击者可以有效地获取密钥信息,实现了针对密码模块的高效率、低成本的非侵入式故障攻击方法。攻击实验利用一台电压源和一台个人电脑,通过8组正确和错误密文对,成功地恢复出一个FPGA中AES密码模块的128 bit完整密钥。 On the FPGA platform, the method of reducing the supply voltage is used to make the data on the critical path of the circuit fail to be set up, so as to achieve the purpose of injecting faults. Based on the appropriate fault model, the attacker can effectively obtain the key information and realize the high efficiency and low cost non-invasive fault attack method for the cryptographic module. The attack experiment used a voltage source and a personal computer to successfully recover the 128-bit full key of the AES cryptographic module in an FPGA with eight correct and incorrect ciphertext pairs.