Encryptor and memory controller including the same

A memory controller comprising:

• a processor;
• and
• a buffer memory configured to temporarily store data that is processed by the processor;
• wherein the processor is configured to perform an encryption operation to:
• perform an XOR operation on first data based on one of a plurality of round key data to obtain a first calculation output;
• perform a substitution operation on the first calculation output using a substitution box (SBOX) that is implemented based on a first corrected lookup table converted from a first standard lookup table, to obtain a second calculation output;
• perform a row transformation operation on the second calculator output to obtain a third calculation output;
• perform a column transformation operation on the third calculation output using the SBOX and a transformation box (TBOX) that is implemented based on second corrected lookup table converted from second standard lookup table, to obtain a fourth calculation output;
• and
• obtain ciphertext data based on the third calculation output and the fourth calculation output.

An encryption method performed by at least one processor, the encryption method comprising:

• performing an XOR operation on plaintext data based on one of a plurality of round key data to obtain a first calculation output;
• performing a substitution operation on the first calculation output using a substitution box (SBOX) that is implemented based on a first corrected lookup table converted from a first standard lookup table, to obtain a second calculation output;
• performing a row transformation operation on the second calculation output to obtain a third calculation output;
• performing a column transformation operation on the third calculation output using the SBOX and a transformation box (TBOX) that is implemented based on a second corrected lookup table converted from a second standard lookup table, to obtain a fourth calculation output;
• and
• obtaining ciphertext data based on the third calculation output and the fourth calculation output.