Abstract: Traditional access control models which are based on identity are not adaptive in P2P environments, which characterize non-centralization, autonomy and dynamic characteristic. We analyzed the access control issue in P2P environments. The existing trust based role access control lacks measures to distinguish users whose results from a trust model are same. We proposed trust attribut}based access control to deal with this problem. Trust attribute-based access control describes users and resources using user attributes and resource attributes. The model builds user role assignment using user attributes, the result from a trust model, environment attributes and authorization policy and builds role permission assignment using resource attributes and authorization policy.

Key words: Access control, Attribute, P2P