The structure and algorithm of safety in a clock synchronization system are the key technology to ensure the safety of the Internet of Things.In this paper,firstly,a concept of the group clock is proposed,and a structure of the clock synchronization safety system of the Internet of Things is designed;Secondly,based on this structure,a algorithm of the clock synchronization is given by using the idea of vote and feedback;At last,a simulative experiment was done to test this structure and algorithm,and the results show that the structure and algorithm can efficiently improve the safety of the clock synchronization system and can resist the attack of malicious nodes from the inside of the Internet of Things.
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