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 framework 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.