隐蔽通信是继加密技术之后一门新兴的信息传输安全技术．随着互联网的飞速发展，基于网络协议和流媒体的隐蔽通信技术蓬勃发展．论文提出了一种采用HOOK技术．基于目前流行的互联网即时通信软件实现隐蔽通信的基本框架．重点研究了通过HOOK技术复用流媒体的基本方法，以及具体的实现算法，在网络即时通信础上，采用HOOK技术实现了一套端到端的隐蔽通信系统．-Covert communication is the second, after a new encryption technology transfer of information security technology. With the rapid development of Internet, Web-based streaming media protocols and covert communication technologies to flourish. This paper proposes a technique used HOOK. Based on the popular Internet instant communication software implementation of the basic fr a mework for covert communication. HOOK technology focuses on the multiplexed stream through the basic methods of media, as well as specific algorithm, real-time communication in the network foundation, using HOOK-end technology to achieve a set of covert communication systems.