IPv6 multi-field covert channel detection method and system based on self-attention mechanism

The invention relates to the technical field of IPv6 network security, in particular to an IPv6 multi-field covert channel detection method and system based on a self-attention mechanism, and the method comprises the steps: obtaining target IPv6 network message data, extracting message field features and forming a feature matrix, the message field features comprising header field features and extended header field features; inputting the characteristic matrix into a covert channel detection model, detecting the characteristics of the message field by using the covert channel detection model, and determining whether a covert channel exists in the target IPv6 network message data; wherein the covert channel detection model carries out weight aggregation on each extracted message field feature based on a self-attention mechanism, and carries out weight fusion on the message field features according to the correlation between the message fields, so as to highlight the key message field features in the detection a