The invention discloses a
sensor node trust value management method of a
wireless sensor network of a tree topology
structure based on
Internet protocol (IP) v 6. The
sensor node trust value management method of the
wireless sensor network of the tree topology
structure based on the IP v 6 comprises the following steps that trust value
estimation is conducted between sensor nodes in a periodicity mode, each
sensor node reports a trust value
estimation result of a neighbour node to a Sink node, all neighbour node trust value
estimation results of a certain sensor node and trust value estimation results of the Sink node on the sensor node are comprehensive, and the trust value estimation at least comprises four dimensions including a proximity index, a loyalty index, a
power consumption degree and a cooperation degree. The method combines the four dimensions of the proximity index, the loyalty index, the
power consumption degree and the cooperation degree to conduct estimation for the node trust value, the trust value
estimation result is high in accuracy and reliability, an attacking node can be timely detected and is conducted
processing, safety and reliability of data communications of a sensor network are ensured, occupation of a security
algorithm on network resources is reduced, and the sensor node trust value management method has good application for a
network topology with dynamic changes.