In the study of Windows NT operating system kernel driver framework, based on Minifilter driver technology and transparent marked technology, a document security with the ability to protect terminals document security protection system is designed and implemented. It not only achieve transparent marked and transparent encryption for document security, but also has access to the document policy controls. This system can effectively avoid the leakage of important terminal information, and improve the file marking technology, the file key embedded in the file marking, file marking play the role of marking document and key management.%在研究Windows NT内核操作系统的驱动框架的基础上,基于Minifilter过滤驱动技术以及文档标识技术,设计并实现了一个具有文件安全保护能力的终端文档安全保护系统.该系统既实现了对终端文档的透明标识及透明加密安全保护,又具有对文档访问的策略控制,能有效地防止终端重要信息的泄漏.改进了文档标识技术,将文档密钥嵌入文档标识中,文档标识不仅起到标识文档的作用,也起到了简化密钥管理的作用.
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