Trust Enhanced Authorization for Distributed Systems

The trust –management approach to distributed system security is developed as an answer to the inadequacy of traditional authorization mechanism. The subjective concept of trust not only enables users to better understand the paradigm of pervasive computing, but also opens new direction of research for solving existing problems such as security [8], management of online communities or e-services lifecycle .This paper specifies research issues in the areas of authorization and trust in distributed environments involving mobile networks, pervasive and ubiquitous computing networks . We here discuss the notion of trusted computing and examine existing authorization mechanisms and their inadequacies. Next we define a logic program based languages and policies that facilitate the modeling process.To the end various approaches to trust enhanced security for overall authorization security in distributed systems are discussed.