Purpose Authorization and access control have been a topic of research for several
decades. However, existing definitions are inconsistent and even contradicting each other …

This paper proposes a secure data access control framework that utilizes the attribute values
and the user specific usage details to provide secure and fine-grained data access. It aims to …

An important way to limit malicious insiders from distributing sensitive information is to as
tightly as possible limit their access to information. This has always been the goal of access …

A publish/subscribe (PS) model is an event-driven model of a distributed system. In
traditional PS systems, each peer (process) can either publish or subscribe events. In this …

Big data technologies have seen tremendous growth in recent years. They are widely used
in both industry and academia. In spite of such exponential growth, these technologies lack …

Unstructured data (mostly text data) have become a vital part in the era of big data. Hence, it
has become increasingly difficult to identify the internal relations among data and describing …

The most popular features of Big Data revolve around the so-called" 3V" criterion: Volume,
Variety and Velocity. Big Data is based on the massive collection and in-depth analysis of …

Smart technological innovations are exponentially generating big amounts of data leading to
the need for new processing and storage technologies. Hadoop is the main Big Data …

Large-scale video surveillance systems are increasingly seen as the answer to problems
concerning public safety, law enforcement, and situational awareness in public places …

Access control enforces authorization policies in order to prohibit unauthorized users from
performing actions that could trigger a security violation. There exist numerous access …