He, Ligang, Duan, K., Chen, X., Zou, D., Han, Z., Fadavinia, A. and Jarvis, Stephen A. (2011) Modelling workflow executions under role-based authorisation control. In: 8th IEEE International Conference on Services Computing (ICSC'11), Washington DC, USA, 4-9th July 2011 pp. 1-10.

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Abstract

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.

Item Type:	Conference Item (Paper)
Subjects:	Q Science > QA Mathematics > QA76 Electronic computers. Computer science. Computer software ?? QA76.73 ??
Divisions:	Faculty of Science > Computer Science
Date:	4 July 2011
Page Range:	pp. 1-10
Identification Number:	10.1109/HiPC.2011.6152727
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Conference Paper Type:	Paper
Title of Event:	8th IEEE International Conference on Services Computing (ICSC'11)
Type of Event:	Conference
Location of Event:	Washington DC, USA
Date(s) of Event:	4-9th July 2011
Related URLs:	Other Repository
URI:	http://wrap.warwick.ac.uk/id/eprint/45666

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