Flexibility is an important property for general access control system and especially in the
Internet of Things (IoT), which can be achieved by access or authority delegation …

The increasing need to share information in dynamic environments has created a
requirement for risk-aware access control systems. The standard RBAC model is designed …

Access control models provide important means for the systematic specification and
management of the permissions in a business information system. While there are may well …

Workflows specify collections of tasks that must be executed under the responsibility or
supervision of human users. Workflow management systems and workflow-driven …

This paper presents a novel access control framework reducing the access control problem
to a traditional decision problem, thus allowing a policy designer to reuse tools and …

Nowadays in popular online social networks users can blacklist some of their friends in
order to disallow them to access resources that other non-blacklisted friends may access …

We survey the state of the art on workflow satisfiability and its practical consequences in
terms of runtime obstructions and resilience. The satisfiability problem is related to …

Delegation is a process of sharing access rights by users of an access control model. It
facilitates the distribution of authorities in the model. It is also useful in collaborative …

Computing a user-task assignment for a workflow coming with probabilistic user availability
provides a measure of completion rate or resiliency. To a workflow designer this indicates a …

Workflow management systems are very important for any organization to manage and
model complex business processes. However, significant work is needed to keep a workflow …