1. A block cipher ARIA substitution apparatus, the apparatus comprising: a first Sbox operation unit for performing operations of a substitution box S 1 and a substitution box S 1 −1 ; a second Sbox operation unit for performing operations of a substitution box S 2 and a substitution box S 2 −1 ; and a control unit for determining modes of the first Sbox operation unit and the second Sbox operation unit.