网络数据通信中的隐蔽通道技术研究

Research on Covert Channel Technologies in the Internet Communications

介绍了隐蔽通道技术的概念，讨论了在网络通信中隐蔽通道存在的技术基础和实现原理，对基于网络通信协议的隐蔽通道技术和基于隐写术的隐蔽通道技术进行了深入分析。在此基础上讨论了隐蔽通道技术的发展趋势并从网络安全的角度给出了对网络通信中隐蔽通道的防范措施。

In the thesis , the conception of covert channels is introduced firstly , then the technology foundation and realization theory of the existing of covert channels in the Internet communications are discussed . The covert channel technologies based on both the network communication protocols and the steganography technologies are emphatically analyzed . Finally , the development trend of the covert channel technologies is discussed , and some preserving measures to the point of network security are also presented .