Encryption device and operating method of encryption device

An encryption device, comprising:

• an encryption core circuit configured to generate output data by performing a plurality of round operations on input data;
• and
• an encryption controller circuit configured to control the encryption core circuit to sequentially perform the plurality of round operations including an initial round operation, an iterative round operation of a preset reference number of times, and a final round operation,
• wherein the encryption core circuit comprises a shiftrow circuit configured to generate shift data by performing a shiftrow operation on the input data, a security circuit configured to generate permutation data by performing a permutation operation including a mixcolumn multiplication operation on the shift data based on a plurality of encoding operations under control of the encryption controller circuit, a mixcolumn addition circuit configured to generate first mid data by performing a mixcolumn addition operation on the permutation data, a mixcolumn multiplication elimination circuit configured to generate second mid data by performing a mixcolumn multiplication elimination operation on the permutation data, and a round key addition operation circuit configured to generate the output data by performing a round key addition operation on the first mid data and the second mid data,
• wherein the iterative round operation includes the shiftrow operation, the permutation operation, the mixcolumn addition operation, and the round key addition operation, and
• wherein the final round operation includes the shiftrow operation, the permutation operation, the mixcolumn multiplication elimination operation, and the round key addition operation.

An operating method being executed by an encryption device, the operating method comprising:

• controlling, by an encryption controller circuit of the encryption device, an encryption core circuit of the encryption device to generate shift data by performing a shiftrow operation on input data;
• generating, by the encryption core circuit, permutation data by performing a permutation operation including a mixcolumn multiplication operation on the shift data based on a plurality of encoding operations under control of the encryption controller circuit;
• generating, by the encryption core circuit, first mid data by performing a mixcolumn addition operation on the permutation data;
• generating, by the encryption core circuit, second mid data by performing a mixcolumn multiplication elimination operation on the permutation data;
• and
• generating, by the encryption core circuit, an output data by performing a round key addition operation on the first mid data and the second mid data.