Grid computing provides a virtual framework for controlled sharing of resources across institutional boundaries. Recently, trust has been recognised as an important factor for selection of optimal resources in a grid. We introduce a new method that provides a quantitative trust value, based on the past interactions and present environment characteristics. This quantitative trust value is used t...

A mobile ad hoc network (MANET) is formed with wireless mobile devices (nodes) without the need for existing network infrastructure. Security design in MANET (Mobile advoc network) is complicated because of its features including lack of infrastructure, mobility of nodes; dynamic topology and open wireless medium .Due to this MANET suffer from many security vulnerability. To enhance the securit...

We introduce the notion of spy agents and describe how they can be deployed within diverse network protocol architectures in order to perform high fidelity trust assessments in remote environments. The spy agent framework developed here consists of: a spy agent structural architecture that instruments and instantiates spy agents with appropriate content; a spy agent routing framework that fabri...

A constructive computational framework for trust and reputation assessments is presented. It is proven free from any inconsistent or contradictory assessments under any scenarios of its application. A prototype implementation has been developed. The framework focuses on a single information-theoretical rule as inference mechanism, thus avoiding any biases or spurious constraints in the solution...