Apparatus and method for judging the legitimacy of transfer data

摘要

When a plurality of data blocks are divided into a plurality of frames and the divided frames are transmitted, every time a frame is received, a interim calculation result of a check code is updated using a transitional calculation result of the check code of the data block corresponding to the frame received and the data included in the frame. When a final calculation result of the check code of a data block is obtained, the calculation result is compared with the check code included in the data block.