Timed automata are a common formalism for the verification of concurrent systems subject to
timing constraints. They extend finite-state automata with clocks, that constrain the system …

Abstract Role-Based Access Control (RBAC) is one of the most used models in designing
and implementation of security policies, in large networking systems. Basic RBAC model …

With the advent of wireless and mobile devices, many new applications are being
developed that make use of the spatio-temporal information of a user to provide better …

Workflows and role-based access control models need to be suitably merged, in order to
allow users to perform processes in a correct way, according to the given data access …

Attribute-based Access Control (ABAC) has been emerging as a suitable choice for large
and federated enterprises due to its flexibility in expressing various types of security policies …

Security analysis of access control models is critical to confirm whether they ensure certain
security properties. Administrative models specify the rules for state transition for any given …

Security analysis is a formal verification technique to ascertain certain desirable guarantees
on the access control policy specification. Given a set of access control policies, a general …

An access control system is often viewed as a state transition system. Given a set of access
control policies, a general safety requirement in such a system is to determine whether a …

In the modern computing era, access to resources is often restricted through contextual
information and the attributes of users, objects and various other entities. Attribute-Based …

Mobile applications allow individuals on-the-move access to resources" anytime, anywhere"
using hand-held mobile devices. We argue that for critical and sensitive resources this is …