Electromagnetic Side Channel Attack against Embedded Encryption Chips

Correlative electromagnetic side channel attack (CEMA) is a common and effective method in side channel attacks. However, a large amount of data acquisition and processing restricts the time of key cracking. This paper proposes a fast side channel attack method, which encrypts the selected plaintexts and filters the collected electromagnetic data on frequency domain, and then performs CEMA analysis. Finally, only 150 pieces of electromagnetic data are used to successfully crack all the keys of the advanced encryption standard (AES) cryptographic algorithm, and the cracking time is reduced to 1/50 of the traditional method.