Distributed Credential Chain Discovery in Trust Management with Parameterized Roles and Constraints (Short Paper)

  • Ziqing Mao
  • Ninghui Li
  • William H. Winsborough
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4307)


Trust management (TM) is an approach to access control in decentralized distributed systems with access control decisions based on statements made by multiple principals. Li et al. developed the RT family of Role-Based Trust-management languages, which combine the strengths of Role-Based Access Control and TM systems. We present a distributed credential chain discovery algorithm for RT 1 C , a language in the RT family that has parameterized roles and constraints. Our algorithm is a combination of the logic-programming style top-down query evaluation with tabling and a goal-directed version of the deductive database style bottom-up evaluation. Our algorithm uses hints provided through the storage types to determine whether to use a top-down or bottom-up strategy for a particular part of the proof; this enables the algorithm to touch only those credentials that are related to the query, which are likely to be a small fraction of all the credentials in the system.


Trust Management Parameterized Role Deductive Database Forward Search Constraint Domain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Ziqing Mao
    • 1
  • Ninghui Li
    • 1
  • William H. Winsborough
    • 2
  1. 1.CERIAS and Department of Computer SciencePurdue University 
  2. 2.Department of Computer ScienceUniversity of Texas at San Antonio 

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