WAVE (Wireless Access for Vehicular Environment) system is a vehicle communication technology to manage the operation of vehicle functions, services to prevent possible accidents and to monitor system failure while driving a car. However an efficiency of the bit calculation scrambler in OFDM modulation of WAVE system will be drop as it is not able to process in parallel in terms of hardware and software. In this paper, it proposes a scrambler calculating in configuration of 64 bit matrix table and a scrambler calculating in find of the starting position of the 64-bit matrix table. The proposed scrambler calculating in find of the starting position of the 64-bit matrix table improves its processing speed approximately 84.71~85.42% faster and performs number of processing(per second) to 3472.23 times more compared to the algorithm of bit calculation scrambler. Additionally the proposed scrambler also improves its processing speed approximately 74.48~75.58% and performs number of processing (per second) to 3003.88 times more compared with the scrambler calculating in configuration of 64-bit matrix table.