A graph representation learning intrusion detection method for class imbalance scenarios

By constructing a source graph and performing node embedding representation, cross-window streaming clustering, and GoG message propagation, the problems of node dilution, cross-window association, and class imbalance in APT attack detection in existing technologies are solved, achieving efficient real-time detection and source tracing of APT attacks.

CN122419829APending Publication Date: 2026-07-17TIANJIN UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
TIANJIN UNIV
Filing Date
2026-03-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing source graph-based IDS suffers from several problems when facing APT attacks. These problems include node representation diluting the initial intrusion information, lack of cross-window correlation ability in streaming detection, and class imbalance, resulting in insufficient model generalization ability and difficulty in capturing the weak features of hidden threats.

Method used

By constructing a source graph, generating node embedding representations, adopting Word2Vec mapping semantics, introducing root path encoding and cross-window streaming clustering, constructing GoG for message propagation, jointly modeling semantic and structural information, and outputting real-time detection results.

Benefits of technology

It enables effective detection and tracing of APT attacks in imbalanced environments, improves the model's ability to identify rare malicious samples and its detection accuracy, reduces the risk of false positives and false negatives, and ensures the system's detection reliability and analysis stability.

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Abstract

本申请涉及计算机信息安全技术领域,尤其涉及一种面向类不平衡场景的图的图表示学习入侵检测方法,包括:将系统审计日志解析建模为溯源图,使节点覆盖进程、文件与网络流,边以系统调用类型标注并附带时间戳以保留时序上下文;基于实体关键属性及其一跳邻域上下文构造描述序列,并采用Word2Vec将离散日志语义映射为稠密向量,生成可比较的节点嵌入表示;基于根路径编码与跨窗口流式聚类将语义相关的节点与片段在线聚合为聚类图,并对未覆盖节点进行相似度分配与结构补全;对聚类图进行图级编码,并在聚类图之上构建GoG进行消息传播,以联合建模语义与结构信息,最终输出用于实时检测的判别结果。
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