Changlai Du

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The goal of a video conferencing system is to deliver multimedia data to the conference participants efficiently and securely. To meet the requirement of a video conferencing system over the internet, many issues have to be addressed, such as security, scalability and heterogeneity. In this paper, we propose a secure and scalable video conferencing system(More)
In this paper, we present MobTrack, a single device system which aims to locate interfering radios on unlicensed ISM band in indoor environments. Compared with existing techniques which require a deployment of dense access points (APs), MobTrack only demands a single device equipped with multiple antennas. The location of an interfering signal source are(More)
With the rapid growth of the scale, complexity and heterogeneity of Peer-to-Peer (P2P) systems, the handle of the peer’s network-oblivious traffic and self-organization has become a great challenge. A potential solution is to deploy servers at different locations as appropriate. However, due to the unique features and requirements of P2P systems,(More)
As computing system continues to play an increasing role in daily life, user authentication is now an important component. One of the most widely accepted methods for user authentication is through proof of knowledge of a piece of secret information, such as password. However, entering this non-mutable secret for authentication in public space often allows(More)
With the increasing popularity of augmented reality (AR) services, providing seamless human-computer interactions in the AR setting has received notable attention in the industry. Gesture control devices have recently emerged to be the next great gadgets for AR due to their unique ability to enable computer interaction with day-to-day gestures. While these(More)
Peer-to-Peer is one of the most popular live streaming delivery technologies owing to its scalability and low-cost. Most practical P2P streaming systems adopt hundreds of channels to deliver streaming to thousands of users simultaneously, and thus there is a great challenge to allocate server resources among these channels efficiently. In practice, most P2P(More)
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