Bernard Butler

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The performance and scalability of access control systems is growing more important as organisations deploy ever more complex communications and content management systems. Fine-grained access control is becoming more pervasive, so decisions are more frequent and policy sets are larger. We outline a flexible performance testing framework that accepts XACML(More)
—The performance and scalability of access control systems is a growing concern as organisations deploy ever more complex communications and content management systems. This paper describes how an (offline) experimental testbed may be used to address performance concerns. To begin, timing measurements are collected from a server component incorporating the(More)
Organisations are deploying ever more complex communications and content management systems to control entitlements to read, write and share protected digital resources. The resulting access control policy infrastructure defines and resolves the complex decision boundary between safety and openness. Moreover, for information security models enabling ethical(More)
—Resource access control policies for an organization are often derived from best practice standards or from high level business policies. To ensure that access control is enforced effectively , these business policies need to be translated into deployable system configurations or lower level policies for multiple diverse systems. These target policy(More)
—There is growing awareness of the need to protect digital resources and services in both corporate and home ICT scenarios. Meanwhile, communication tools tailored for corporations are blurring the line between communication mechanisms and (near) real-time resource sharing. The resulting requirement for near real-time policy-based access control is(More)
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