HFC网数据信息安全方法研究

本文以HFC网络的基本结构、安全隐患，及有线网络的通信协议为基础，详细论述了如何通过更改MAC层的通讯协议，在MAC层加密传送的数据信息以确保HFC网络中上下行数据的通讯安全，具体分析了加密过程中CMTS与CM之间的会话通讯过程，终端身份验证，及密钥的传递，更新与时序同步等问题，同时还提出了HFC网络中数据信息加密的纵向加密层次的思想，并对它的可靠性和性能进行了整体评价。

THE RESEARCH OF DATA SECURITY OVER HEC NETWORKS

Based on the basic structure, potential security problem and cable network's communication protocol of HFC networks, this paper discusses how to make sure the data security of the uplink and down link communication over HFC networks by modifying the MAC protocol. This paper analyzes the communication process between CMTS and CM, the methods of the terminals' identity authentication, key transmission, updating and synchronization issues, it also puts forward the idea of vertical encryption architecture for the data communication in HFC networks in detail. At last, it evaluates the combination of its performance and reliability.