Research of Audit Mechanisms of Secure OS of B3 Level
访问验证保护级安全操作系统审计机制研究*

How to design and develop the audit module for secure operating system of B3 level were discussed. Adding the audit of covert channel to improve the audit design by analyzing the inter process communication and the character of the system. A mechanism of alert based on the audit event was put forward. The key measure was composed of the audit of secure parameter and the analysis of interrelated event and the timestamps of the covert channel. The system secure performance was enhanced.