本文通過借鑒智能代理(agent)技術，并結合XML 和安全通信技術，提出了一種具有兩層代理結構的分布式入侵檢測系統模型，并設計實現了原型系統。該模型有多個域組成，域內采用分層結構，域間采用P2P(peer to peer)結構。域內的檢測agent 分布在受保護各個主機上執行檢測任務，檢測結果向本域內的數據中心匯報。協作agent 綜合本域內數據中心的報警信息進行分析，產生本地報警，并通過XML向其他域中協作agent 告警。作為冗余成分的協作agent 的存在避免了系統結構上的單點失效。數字簽名和加密技術確保了agent 通信的安全。分布性、健壯性、智能性和協作性是該系統模型主要特點。
關鍵詞：協作；Agent；IDS；XML；入侵檢測系統
[Abstract]: Using agent’s technology for reference, combining XML & security communication technology, we present a distributed intrusion detection system model of two-layer agent structure; we design and implement a prototype system. The model consists of several domains. In each domain, structure is layered, while between each two domains, structure is peer to peer. Every detect-agent of each domain monitors the host-protected in the network and the result of monitor is reported to data center in the same domain. Cooperative agent synthesizes the result of every detect-agent in the same domain, analyze it and give an alarm to local domain and to the cooperative agent of other domain with XML. Cooperative agent of Redundancy avoids malfunction of single cooperative agent in the model. The digital signature and encrpytion techniques ensure security of correspondence between agents. This system model possesses characteristics such as distribution, robustness,intelligence and cooperation nature etc.
[key words]: cooperation; Agent; IDS;XML