Electronics and Telecommunications Research Institute

Chang Ho Jung

Il Hwan Park

Hyeon Jin Kim

Chang Kyun Kim

E Joong Yoon

An encryption/decryption apparatus and method using an advanced encryption standard (AES) Rijndael algorithm are provided. The apparatus includes a round key operator that performs arithmetic operations on a round key for a first round and first partial round keys of round keys for second to last rounds and generates the round keys for the second to last rounds, and a round executor that performs an encryption or decryption operation using the round key for the first round and the round keys for the second to last rounds.

Encryption/decryption apparatus and method using AES rijndael algorithm

A plurality of S-boxes is masked by one masking inverse table. Therefore, the computation cost and the use amount of the RAM necessary for masking at the time of a masking operation for defending a differential power analysis attack in a SEED encryption algorithm can be effectively reduced.

Growing community of inventors

Daejeon, South Korea

Chang Ho Jung