Differential Fault Analysis Attack Resistant Architectures for the Advanced Encryption Standard

We present two architectures for protecting a hardware implementation of AES against side-channel attacks known as Differential Fault Analysis attacks. The first architecture, which is efficient for faults of higher multiplicity, partitions the design into linear (XOR gates only) and nonlinear blocks and uses different protection schemes for these blocks. We protect the linear blocks with linear codes and the nonlinear with a complimentary nonlinear operation resulting in robust protection. The second architecture uses systematic nonlinear (cubic) robust error detecting codes and provides for high fault detection for faults of low and high multiplicities but has higher hardware overhead.