We present a modeling language for the model-driven development of secure, distributed systems based on the Unified Modeling Language (UML). Our approach is based on role-based access control with additional support for specifying authorization constraints. We show how UML can be used to specify information related to access control in the overall design of an application and how this informati...

A further development of the synchronous array method (SAM) as a medium access control scheme for large-scale ad hoc wireless networks is presented. Under SAM, all transmissions of data packets between adjacent nodes are synchronized on a frame-byframe basis, and the spacing between concurrent cochannel transmissions of data packets is properly controlled. An opportunistic SAM (O-SAM) is presen...

Cloud data storage lets customers store vast amounts of cheaply on demand. Cryptographic role-based access control (RBAC) systems preserve cloud privacy by restricting to users. This study develops a trust model reason about and improve security in cryptographic RBAC systems. The degrees the user determine rights are performed User Activity Monitoring Agent (UAMA). Two different misconducts use...