Design of embedded network router for video based on security consideration

Full consideration of security and the characteristic of large amounts of data of video in network, the embedded router gets designed. The FPGA development system and uclinux are adopted as the platform. The Qi hyperchaotic, Logistic mapping, Baker mapping and Cat mapping algorithm is applied to video encryption and decryption. Additionally combination of on-line encryption and off-line encryption, random encryption and multiple encryption methods make the security of data stronger; create a protocol of IP fragment assembly to overcome the bug of the TCP/IP stack in uclinux and the problem of packet loss. The system has been tested to run a long time and it is proved to be stable with a high security. As a platform, the system implements the complex encryption algorithms at a very low cost of hardware: a 87MHz processor, and only 10M memory. But it still has the potential to develop more complex algorithms and applications. So the system has a broad prospect both in the area of application and research.