Tin Qian

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Maintenance remains by far the most expensive phase of software products. One primary reason is because as a complex software system evolves, its implementation tends to diverge from the intended or documented design models. Such undesirable deviation makes the system hard to understand, modify, and maintain. This thesis presents a hybrid, tool-based(More)
Developing multimedia applications, such as video and audio applications, is a diicult task because of the stringent requirement on system resources and the great diversity of multimedia standards and devices. Many existing multimedia systems are monolithic and extremely complex. It is hard to extend and reconngure those systems. Easy exten-sibility and(More)
This paper proposes two frameworks for secure multicast on active networks. The frameworks exploit the computational power of active networks to provide the security desired for multicast, while removing drawbacks in traditional approaches. The main security component in the frameworks is the Active Capability(AC) which replaces the passive session key. The(More)
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