Abstract:

In the paper, based on the Role Based Authorization framework (RBA) in secure Operation Systems (OSs), we propose an approach to dynamic role transition in Kylin OS, using the way of trustworthiness measurement for the uncertainties in authentication systems. In the model, through quantifying the uncertainty of authentication and constraining the bound of role transition, the process of role transition can be completely transparent to users, thus guaranteeing the safety and stability of OS.

Key words: RBA；authentication trustworthiness measurement；dynamic role change