链路加密是保护内部网络数据安全的一种有效方法。为了加密内部网络数据的安全性,本文分析了Win-dows网络驱动程序以及网络驱动程序接口规范(NDIS),提出一种基于NDIS的网络链路加密方案。文章对该方案的原理和实现过程进行了描述。经过实验,可以得出本方案可以有效的保护网络数据,是切实可行的。 Link encryption is an effective way to secure the data in the internal network. In order to encrypt the security of internal network data, this paper analyzes Win-dows network driver and network driver interface specification (NDIS), and proposes a network link encryption scheme based on NDIS. The article describes the principle and implementation process of the program. After experiments, it can be concluded that this program can effectively protect the network data is feasible.