A transmission system is provided with a material output device, a multiplexing device and a message authentication code generation device. The material output device transmits MPEG media transport protocol (MMTP) packets. The multiplexing device multiplexes the MMTP packets to generate multiplexed data. The message authentication code generation device generates a message authentication code using data except a time stamp and/or a packet counter in the MMTP packets included in the multiplexed data in accordance with a preset message authentication system, and adds the message authentication code to the MMTP packets.
展开▼
