RBAC Policies in XML for X.509 Based Privilege Management. - David W. Chadwick; Alexander Otenko (SEC, 2002)

Persistent versus Dynamic Role Membership. - Jean Bacon; David W. Chadwick; Alexander Otenko; Ken Moody (DBSec, 2003)

The PERMIS X.509 role based privilege management infrastructure. - David W. Chadwick; Alexander Otenko (Future Gener. Comput. Syst., 2003)

Role-Based Access Control With X.509 Attribute Certificates. - David W. Chadwick; Alexander Otenko; Edward Ball 002 (IEEE Internet Comput., 2003)

Using SAML to Link the Globus Toolkit to the Permis Authorisation Infrastructure. - David W. Chadwick; Sassa Otenko; Von Welch (Communications and Multimedia Security, 2004)

A Heterogeneous Network Access Service Based on PERMIS and SAML. - Gabriel López Millán; Óscar Cánovas Reverte; Antonio Fernandez Gómez-Skarmeta; Sassa Otenko; David W. Chadwick (EuroPKI, 2005)

Development of a Flexible PERMIS Authorisation Module for Shibboleth and Apache Server. - Wensheng Xu; David W. Chadwick; Sassa Otenko (EuroPKI, 2005)

'R-What?' Development of a role-based access control policy-writing tool for e-Scientists. - Sacha Brostoff; Martina Angela Sasse; David W. Chadwick; R. James Cunningham; Uche M. Mbanaso; Sassa Otenko (Softw. Pract. Exp., 2005)

Distributed Key Management for Secure Role based Messaging. - Gansen Zhao; Sassa Otenko; David W. Chadwick (AINA (1), 2006)

Adding Support to XACML for Dynamic Delegation of Authority in Multiple Domains. - David W. Chadwick; Sassa Otenko; Tuan-Anh Nguyen (Communications and Multimedia Security, 2006)

Coordination between Distributed PDPs. - David W. Chadwick; Linying Su; Alexander Otenko; Romain Laborde (POLICY, 2006)

Obligations for Role Based Access Control. - Gansen Zhao; David W. Chadwick; Sassa Otenko (AINA Workshops (1), 2007)

Multi-session Separation of Duties (MSoD) for RBAC. - David W. Chadwick; Wensheng Xu; Sassa Otenko; Romain Laborde; Bassem Nasser (ICDE Workshops, 2007)

Achieving fine-grained access control in virtual organizations. - Ning Zhang 001; Li Yao; Aleksandra Nenadic; Jay Chin; Carole A. Goble; Alan L. Rector; David W. Chadwick; Sassa Otenko; Qi Shi 001 (Concurr. Comput. Pract. Exp., 2007)

PERMIS: a modular authorization infrastructure. - David W. Chadwick; Gansen Zhao; Sassa Otenko; Romain Laborde; Linying Su; Tuan-Anh Nguyen (Concurr. Comput. Pract. Exp., 2008)

Adding support to XACML for multi-domain user to user dynamic delegation of authority. - David W. Chadwick; Sassa Otenko; Tuan-Anh Nguyen (Int. J. Inf. Sec., 2009)