Well understood methods exist for developing programs from given specifications. A formal method identifies proof obligations at each development step: if all such proof obligations are discharged, a precisely defined class of errors can be excluded from the final program. For a class of “closed” systems such methods offer a gold standard against which less formal approaches can be measured. Fo...

This paper focuses on synthesizing control policies for discrete-time stochastic systems together with a lower bound the probability that satisfy complex temporal properties. The desired properties of system are expressed as linear logic (LTL) specifications over finite traces. In particular, our approach decomposes given specification into simpler reachability tasks based its automata represen...

Role-Based Access Control (RBAC) has been widely used in information systems, including so-called critical systems. In business, workflows are to control the flow of processes. One major issues concerning these processes is be able verify that a proposed process model strictly corresponds specifications which it supposed respond. models describe frameworks dictate permissions. The RBAC generall...