Witch's intrusion detection method in underwater sensor network

The present invention relates to witch's intrusion detection method in a kind of underwater sensor network, including three phases: (1), suspect node cognitive phase: anchor node is according to the suspect node in the information bag identification network received；(2), witch's node determines the stage: anchor node calculates the state estimation value of suspect node, then compares suspect node positional information and determine witch's node；(3), witch's node isolation stage: witch's node is deleted from network by anchor node to base station repeats witch's node, base station.The good effect that the present invention is had is: highly effective can detect witch's malicious attack, it is ensured that the safety of network；The hardware condition of node is not had strict restriction, is not limited by specific information or specific node etc., there is good autgmentability.