Community decisions about access control in virtual communities are non-monotonic in nature. This means that they cannot be expressed in current, monotonic trust management languages such as the family of Role Based Trust Management languages (RT). To solve this problem we propose RTo, which adds a restricted form of negation to the standard RT language, thus admitting a controlled form of non-monotonicity. The semantics of RTo is discussed and presented in terms of the well-founded semantics for Logic Programs. Finally we discuss how chain discovery can be accomplished for RTo.
|Place of Publication||Enschede|
|Publisher||Distributed and Embedded Security (DIES)|
|Number of pages||12|
|Publication status||Published - Jun 2005|
|Name||CTIT Technical Report Series|
|Publisher||University of Twente, Centre for Telematics and Information Technology (CTIT)|
- EC Grant Agreement nr.: FP6/507894
- Role Based Trust Management (RT)
- Chain Discovery
- Peer to Peer (P2P)
- Virtual Communities (VC)
- Non-monotonic Policies
- Distributed Trust Management (DTM)
Czenko, M. R., Tran, H. M., Doumen, J. M., Etalle, S., Hartel, P. H., & den Hartog, J. (2005). Nonmonotonic Trust Management for P2P Applications. (CTIT Technical Report Series; No. TR-CTIT-05-22). Enschede: Distributed and Embedded Security (DIES).