Abstract: A minimum overhead secure network coding based on chaotic sequence was presented in this paper．Only the source needs to be modified,and intermediate nodes implement a classical distributed network code.So the proposed scheme is applied to all the linear network coding．It combines the chaotic sequence with original source information vector,because of the high randomness and the sensitivity to initial state of chaotic sequence,and the presented network code is “One-Time Pad (OTP)”．So the secure network coding achieves complete secrecy．This scheme requires only one noisy symbol to be embedded in the original information symbol vector to achieve complete secrecy．The theoretical analysis confirms that this scheme can achieve the information-theoretic security condition and the signaling overhead to obtain complete security is minimized,while the attacker has limited wiretapping ability.

Key words: Network coding,Chaotic sequence,One-time pad(OTP),Applicability,Complete secrecy,Minimum overhead