Chen, Liang, Crampton, Jason, Kollingbaum, Martin J. and Norman, Timothy J. (2012) Obligations in risk-aware access control. In: 10th Annual International Conference on Privacy, Security and Trust, 16-18 Jul 2012, Paris, France.

Chen, Liang and Crampton, Jason (2011) Risk-aware role-based access control. In: 7th International Workshop on Security and Trust Management, 27-28 Jun 2011, Copenhagen, Denmark.

Chen, Liang and Crampton, Jason (2009) Set covering problems in role-based access control. In: Computer Security - ESORICS 2009. Lecture Notes in Computer Science, 5789. Springer, Heidelberg, Germany, pp. 689-704. ISBN 9783642044434

Chen, Liang and Crampton, Jason (2008) On spatio-temporal constraints and inheritance in role-based access control. In: 3rd ACM Symposium on Information, Computer and Communications Security, 18-20 Mar 2008, Tokyo, Japan.

Chen, Liang and Crampton, Jason (2007) Applications of the oriented permission role-based access control model. In: 26th IEEE International Performance Computing and Communications Conference, 11-13 Apr 2007, New Orleans, USA.

Chen, Liang and Crampton, Jason (2007) Inter-domain role mapping and least privilege. In: 12th ACM Symposium on Access Control Models and Technologies, 20-22 Jun 2007, Sophia Antipolis, France.