Smart mobile devices and cloud computing are widely used today. While mobile and
portable devices have different capabilities, architectures, operating systems, and …

In conventional database, the most popular access control model specifies policies explicitly
for each role of every user against each data object manually. Nowadays, in large-scale …

Information sharing among heterogeneous databases requires increasing attention and
poses a pressing need. Successful protection of information by an effective access control …

The issue of securing a collaboration within an information system is often addressed from
the viewpoint of establishing a security policy that grants access to data by what role an …

One of the main approaches to accessing heterogeneous data is via the use of a mediation
framework. The current problem with mediation systems is that they are viewed as black …

Abstract The Three-Layer distributed mediation architecture, designed by Secure System
Architecture laboratory, employed a layered framework of presence, integration, and …

Information systems that use the mediation architecture are well suited to accessing
heterogeneous data in a distributed environment. These mediation systems utilize a central …

E-Chord is a Distributed Hash Table algorithm (DHT) inspired from Chord, Pastry and CAN
algorithms. It meant to provide a keyword-based search in the Three-Layer Mediation …

With the constant proliferation of information systems around the globe, the need for
decentralized and scalable data sharing mechanisms has become a major factor of …

In multiple data sources environment where open access is to be provided to the users not
known to the system, the credential based access control has emerged as a suitable …