Flexible support for multiple access control policies
A unified framework for enforcing multiple access control policies
Proceedings of the 1997 ACM SIGMOD international conference on Management of data - SIGMOD ’97
ACM Transactions on Database Systems
V. S. Subrahmanian
Sushil Jajodia
Eliza Bertino
Maria Luisa Sapino
Fine-Grained Access Control via Policy-Carrying Data
An agreement centric access control mechanism for business to business e-commerce