Towards a VO Intersection Trust Model for Ad hoc Grid Environment: Design and Simulation Results

摘要

An ad hoc grid environment is a spontaneous organization of cooperating heterogeneous nodes in a logical community without a fixed infrastructure and with only minimal administrative requirements. Trust is an integral part of ad hoc grid computing systems as well. It is not possible to utilize trust principles of traditional grid environment uses various, mostly centrally oriented methods for trust establishment, e.g. certification authorities, VO management servers or credentials pools. An ad hoc grid environment demands minimal administrative requirements; especially an absence of a central trust authority, where collaborating entities must establish and maintain a trust relationship among themselves. Our article presents a design of two algorithms for a supported authorization mechanism in order to more easily form virtual organizations based on attribute certificates. Moreover, an evaluation of the two algorithms, primary and extended algorithm, based on simulation results as well as deeper insights into the configuration of such schemes in ad hoc grid environment are described.