A key assignment scheme is a cryptographic technique for implementing an information flow
policy, sometimes known as hierarchical access control. All the research to date on key …

In the last few years, mobile cloud computing (MCC) gains a huge development because of
the popularity of mobile applications and cloud computing. User authentication and access …

The ubiquitous nature of the Internet is enabling a new generation of-pUcations to support
collaborative work among geographically distant users. Security in such an environment is …

With the emergence of diverse group-based services, multiple multicast groups are likely to
coexist in a single network, and users may subscribe to multiple groups simultaneously …

The need for content access control in hierarchies (CACH) appears naturally in all contexts
where a set of users have different access rights to a set of resources. The hierarchy is …

In a user hierarchy we say that a security class is subordinate to another security class if the
former has a lower security privilege than the latter. To implement such a hierarchical …

The content access control problem appears in any context with a set of users and
resources. The difference in access rights of the users defines classes, where members of a …

Group key management (GKM) is an important research topic in mobile multicast
communication nowadays. With the development of multiple services based on groups, it …

The ease of deployment of economic sensor networks has always been a boon to disaster
management applications. However, their vulnerability to a number of security threats makes …

By advances in cloud computing, users are allowed to remotely store their data in the cloud,
manage the stored data without limitation of time and place, and give rights to visitors that …