A Smart Design of Hardware Trojan and Differential Fault Analysis in AES

Hardware Trojan is an additional circuit with malicious functions in integrated circuit (IC), which can leak the secret information of integrated circuit under rare conditions. In this paper, we propose a hardware Trojan of small scale and low trigger probability in AES encryption circuit, which can inject fault in AES circuit. And we can get the key information in AES circuit by differential fault analysis. The result of attack experiment on the FPGA chip shows that two groups of correct ciphertext and wrong ciphertext can be used to restore the whole key in AES, and it only takes 5s.