WIA-PA网络的入网认证和密钥更新机制研究

Research on Network Access Authentication and Key Update Mechanism for WIA-PA Network

WIA-PA是我国自主研发的、用于工业过程自动化的无线网络规范。研究了WIA-PA网络所处工业现场环境恶劣、节点资源非常受限的现状,提出并分析了由中间节点发起认证请求和散列函数生成安全信息的入网认证方案,以及使用单向散列函数的密钥更新方案。入网认证方案减小了通信消耗和组网时间,密钥更新方案实现了消息认证和消息源认证。分析结果表明,入网认证方案保证了所有入网节点的合法性,密钥更新方案保证了更新密钥的安全有效。

WIA-PA is the wireless network specification researched and developed in our country for using in industrial process automation area.The current status of WIA-PA network such as the harsh environment of the industrial fields and limited node resource is studied.The strategy of network access authentication that is issuing request of authentication by intermediate node,and creating security information by hash function;and the dongle update strategy by using one-way hash chain function are proposed.The features of proposed strategies are analyzed;the network access authentication strategy reduces communication consumption and networking time;and the dongle update strategy implements authentication of message and message resource.The results of analysis indicate that network access authentication strategy ensures the legitimacy of all the nodes,and the dongle update strategy guarantees the security and effectiveness of dongle update.