Concurrency control performance modeling: alternatives and implications
ACM Transactions on Database Systems (TODS)
On the semantics of “now” in databases
ACM Transactions on Database Systems (TODS)
Proposed NIST standard for role-based access control
ACM Transactions on Information and System Security (TISSEC)
Executable declarative business rules and their use in electronic commerce
Proceedings of the 2002 ACM symposium on Applied computing
Protecting deductive databases from unauthorized retrieval and update requests
Data & Knowledge Engineering - Data and applications security
Binder, a Logic-Based Security Language
SP '02 Proceedings of the 2002 IEEE Symposium on Security and Privacy
SD3: A Trust Management System with Certified Evaluation
SP '01 Proceedings of the 2001 IEEE Symposium on Security and Privacy
Flexible access control policy specification with constraint logic programming
ACM Transactions on Information and System Security (TISSEC)
Personalizing access control by generalizing access control
Proceedings of the 15th ACM symposium on Access control models and technologies
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We address the problem of defining policies that may be used in the evaluation of requests made by client actors, in the course of web-based e-trading, to perform actions on the resources maintained by the server agents of an e-cooperative. An e-cooperative is a group of agents in cyberspace that may act individually or in conjunction with other agents to satisfy a client's request to act. Our principal contribution to this key problem is to define formally an event-oriented model in terms of which policies may be specified for helping to ensure that only legitimate forms of client actions are performed in the course of engaging in e-trading via the web. We call this model the Event-oriented Web-based E-trading (EWE) model. Policies defined in terms of the EWE model are used to specify a set of actions that client actors can perform as a consequence of the client having a particular status. We define the EWE model using a logic programming language and we give examples of web-based e-trading policy representation, validation and evaluation.