| Popis: |
It is suggested that the notion of obligation found in modal logic can be used as the fundamental notion in formally specifying integrity. Integrity as represented by Clark-Wilson-type models is discussed. It is argued that the essential part of their model, for the purpose of formal specification, is an expression of required connectivity in a graph representing integrity subjects. A review of knowledge logic is given, followed by a discussion of a logic of security that contains operators for knowledge and obligation. A formal semantic definition of integrity based on operator nets is given. > |
