Protecting access to digital resources is one of the fundamental problems recognized in
computer security. As yet it remains a challenging problem to work out, starting from the …

Access control models describe frameworks that dictate how subjects (eg users) access
resources. In the role-based access control (RBAC) model access to resources is based on …

In role-based access control (RBAC), users gain access to predetermined roles and
permissions. Thus, desired results are not achieved in emergency situations through policy …

Abstract Electronic Patient Health Record (EPHR) systems may facilitate a patient not only to
share his/her health records securely with healthcare professional but also to control his/her …

Volume visualization using isosurface extraction is a well-researched topic. Research
demonstrated that even for unstructured grids peak performances of millions of tetrahedra …

Access control defines what users can perform within a system. It is usually defined by
software engineers and end users are seldom asked for cooperation. The main objective of …

In the paper, an integrated approach for the modeling and enforcement of delegation
policies in process-aware information systems is presented. In particular, a delegation …

Recently, the importance of including obligations as part of access control systems for
privilege management, for example, in healthcare information systems, has been well …

SystemsRole-based access control (RBAC) has been widely used in information systems
including so-called critical systems. Access control models describe the frameworks that …

The traditional role-based access control (RBAC) model is typically static, ie, permissions
are granted based on a policy that seldom changes. A more flexible support for access …