A secured video streaming system

The Internet Protocol Television (IPTV) service provides rich multimedia services over IP networks and is considered as a potential killer application over the Internet. The intellectual property management protocol (IPMP) system becomes important in developing this network media applications. In this paper, security function, media streaming service system and the user terminal that adopted IPMP are seamlessly integrated to provide a secured live media streaming service. In addition, the peer-to-peer (P2P) network connecting method between user terminals is also developed to provide a stable P2P IPTV system. For one incoming peer, the IPTV system would select a parent peer with low-delay and with better uplink capability than the incoming peer. It would help to maintain a stable media streaming framework. When one peer want to leave the system, it has to look for each children peer and designate a new parent peer according to above rules before updating the parent peer parameter of current one. In addition, the system can adjust the streaming bandwidth of media server to absorb the dynamic network conditions. For security control, the Advanced Encryption Standard (AES) encryption is adopted in our system, in which the certificate is encrypted with the regular updated Digital Video Broadcasting-Common Scrambling Algorithm (DVBCSA) keys to prevent possible attacks. Experiments show that average bit rate and transmission delay can be maintained in good performances even when most peers are with low uplink capability.