Research On 2-Dimension Dempster-Shafer Evidence Theory In Dynamic Multi Agent System

With the development of Multi-Agent System (MAS) and the related research on it, the system design, organization and implementation of tradition MAS are getting much mature than ever before. Based on tradition MAS, Dynamic MAS (DMAS) has been proposed by Philippe Mathieu. DMAS splits the detail business logic execution object from the computing resource, which enables MAS to have much more reliability and flexibility. Though with these advantages, the applications constructed by MAS are little because the security and trust problem in MAS have not been successfully solved until now. Though tradition encoding, digital signature and authorization technology has got satisfying achievements and Public Key Infrastructure (PKI) has been a key part of network security component, these technologies just ensure the consistency of data but can't solve the trust problem in MAS when an illegal agent try to attack MAS by interacting with other agents. The formal Dempster-Shafer evidence theory can solve part of the trust problem in tradition MAS, but can't describe the exact trust model of dynamic MAS due to the concept of Skill in DMAS, which restrict the appliance of DMAS. Based on these concepts, this paper focuses on the followingresearches in order to solve the trust problem in DMAS:Take a systematical analysis of current D-S theory, D-S related improving model and the problem of applying it to MAS, which leads to the conclusion that tradition D-S theory can't solve the trust problem in DMASPropose 2-dimension D-S theory and trust model in DMAS based...