Modelling workflow executions under role-based authorisation control

Research output: Chapter in Book/Report/Conference proceedingConference contribution


  • Ligang He
  • Kewei Duan
  • Xueguang Chen
  • Deqing Zou
  • Zongfen Han
  • Ali Fadavinia

Colleges, School and Institutes

External organisations

  • University of Warwick
  • University of Bath
  • Huazhong University of Science and Technology


Workflows are often used to represent enterprise-type activities, and authorisation control is an important security consideration in enterprise-level applications. Role-Based Access Control (RBAC) is a popular authorisation control scheme under which users are assigned to certain roles, and the roles are associated with permissions. This paper presents a novel mechanism for modelling workflow execution in cluster-based resource pools under Role-Based Access Control (RBAC) schemes. Our modelling approach uses Coloured Timed Petri-Nets, and various authorisation constraints are modelled, including role constraints, temporal constraints, cardinality constraints, Binding of Duty and Separation of Duty constraints, etc. The interactions between workflow authorisation and workflow execution are also captured in the model. In this paper, the modelling mechanism is developed in such a fashion that the construction of the authorisation model for a workflow can be automated. This feature is very helpful in modelling a large collection of authorisation policies or complex workflows. A Petri-net simulation tool, the CPN-Tool, is utilised to implement the developed modelling mechanism and simulate the constructed model. Both system-level performance (e.g., utilisation of resource pools) and application-level performance (e.g., workflow response time) can be obtained from model simulations. This work can be used to plan system capacity and investigate the impact of authorization policies on system and application performance.


Original languageEnglish
Title of host publicationProceedings - 2011 IEEE International Conference on Services Computing, SCC 2011
Publication statusPublished - 2011
Event2011 IEEE International Conference on Services Computing, SCC 2011 - Washington, DC, United States
Duration: 4 Jul 20119 Jul 2011

Publication series

NameProceedings - 2011 IEEE International Conference on Services Computing, SCC 2011


Conference2011 IEEE International Conference on Services Computing, SCC 2011
Country/TerritoryUnited States
CityWashington, DC


  • Authorisation, Modelling, RBAC, Workflow