网络摄像头传输层的安全技术设计

Transport Layer Security Technology Design of Web-camera

针对网络摄像头图像数据与控制信息在Internet传输过程中易被窃取和篡改等缺陷,引入了ARM处理器对数据进行加密和保护。考虑到图像数据比较庞大以及ARM处理器处理能力的局限性,为了保证采集图像数据流实时性的同时提高数据的安全性,提出了利用DES加密算法对TCP/IP协议中传输层的首部字段和应用层数据段进行加密,同时将传输层的TCP/UDP协议转换为自拟的SDTCP/SDUDP协议,并设计了一种网络摄像头加解密设备。实验证明,该设备能实时处理网络摄像头的数据流,同时保证了图像数据的正确性和保密性,防止各类运输层或应用层的非法网络攻击。

In accordance with the drawback that web-camera＇s image data and control information data is easy to be stolen and tampered with during transmission on the Internet, ARM embedded system is used to encrypt and protect data. Because of the huge image data and limitations o{ the ARM CPU, to guarantee gathering image data stream in real-time and to increase data security, this proposal exploits technology of transport layer security which uses cryptographic algorithm of DES and protocol conversion of IP package. The theoretical analysis and experiment verifies that this system can process the data stream instantly, and simultaneously assure the accura cy and privacy of the data stream.