Hardware cryptographic engine and hardware cryptographic method using an efficient S-BOX implementation

摘要

A hardware cryptographic engine implementing an Advanced Encryption Standard (AES) algorithm is disclosed. The hardware cryptographic engine comprises a plurality of modules corresponding to rounds of AES. Each of the plurality of modules comprises an S-BOX computing a multiplicative inverse of each element in an input vector over GF(2⁸) using an operation over GF(((2²)²)²), and replacing each element of the input vector with a substitute element obtained using a result of the operation.