The popularity of online social networks (OSNs) makes the protection of users' private
information an important but scientifically challenging problem. In the literature, relationship …

Inspired by the access control models of social network systems, Relationship-Based
Access Control (ReBAC) was recently proposed as a general-purpose access control …

With wide development of various information technologies, our daily activities are
becoming deeply dependent on cyberspace. People often use handheld devices (eg …

Neo4j is a popular graph database that offers two versions: an enterprise edition and a
community edition. The enterprise edition offers customizable Role-based Access Control …

Abstract Cyber-Physical-Social Space (CPSS) is a promising paradigm to provide people
with an intelligent environment by emphasizing the deep fusion of cyberspace, physical …

Context-awareness is an important aspect of the dynamically changing environments and
the relationship context information brings new benefits to the access control systems …

Location Based Services are becoming more and more popular as users are enjoying a
wide range of services such as tracking friends, finding the nearest cash machine, querying …

The ubiquity of low-cost GPS-enabled mobile devices and the proliferation of online social
networks have enabled the collection of rich geo-social information that includes the …

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 …

In an open Internet-of-Things (IoT) environment, the chance encounters of smart devices
have made it difficult to articulate access control policies for complete strangers. Based on …