A new access control model incorporating the notion of time and events is introduced. It allows the specification of fine-grained and flexible security policies which are sensitive to the operating environment. The system constraints, expressed in terms of access windows and obligations, are stored in extended access control lists. The addition of a capability mechanism gives another dimension of protection and added flexibility, so that the flexibility and expressive power of the system constraints is fully supported by the underlying mechanism. The approach is compared to several existing models and its' expressive power is demonstrated by showing the new model can be used to specify different existing security models as well as some special problems. The model is then adapted to work in a distributed environment. / Science, Faculty of / Computer Science, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/28945 |
| Date | January 1990 |
| Creators | Jaggi, Felix P. |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
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