Speci cation of Dynamic Networks

A dynamic network is a network whose components may interact on channels established dynamically by the communication of their associated ports This paper generalises a speci cation technique based on input output relations on streams to capture the special kind of privacy preservation found in such networks A privacy preserving component never accesses depends on or sends a port whose name it does not know Composite speci cations de scribing networks of such components are built from elementary speci cations with three specially designed operators one operator for static hiding one for dynamic hiding and one for parallel composition modulo many to many communication The need for the three operators is motivated by a small example