This study presents a novel sequential Type-I optimal normal basis multiplier in GF(2(superscript m)) with a regular structure. The proposed multiplier has a slightly higher space complexity than the Reyhani-Masoleh-Hasan's (RMH) multiplier, but is 27% faster than the RMH multiplier. Furthermore, the proposed multiplier is highly regular, modular, expandable and well-suited to VLSI implementation. A new normal basis inverter based on the proposed multiplier is also invented. The proposed inverter provides better time-area complexity than existing inverters as with large m.