Abstract: There are some problems with the increase of the users of Internet. For example, the network bandwidth and security can’t afford the needs for QoS of multimedia data. This Paper focuses on the research of encryption technology and adaptive adjusting mechanism of data communication. This encryption of real-time multimedia data is achieved by the way of key database. The adaptive congestion mechanism is implemented in the multicast router by classifying the information according their priority at the time of encryption. The results of a series of experiments prove the performance of the control method.

Key words: Video transmission, Adaptive congestion control, Network security, Multicast

摘要： 目前多媒体数据在因特网上传输的安全性及网络带宽已经无法满足用户越来越高的需求。该文研究了视频数据加密技术以及数据传输速率动态调整机制。在数据加密方面提出了采用密钥数据库来增强加密数据的安全性策略，通过组播路由器进行动态拥塞控制，该方法是在加密的同时将数据按优先权分类，避免了拥塞情况的发生。大量的仿真实验证明，该控制方法具有较高的性能。

关键词: 视频传输, 自适应拥塞控制, 网络安全, 组播

CLC Number: 

• TN919.85