1. the first component reflects the potential actual states that the system could occupy at the current time, while the second component indicates the potential fake states perceived by an eavesdropper following defensive actions. Since the evolution of the D-C-diagnoser follows all defensive actions defined at state (q d , q D ) ? Q DC , it may reach some problematic states;D ) ? Q Specifically;this regard, we remove such problematic states from the D-C-diagnoser by the following three rules: 1. Admission rule: state (q d , q D ) ? Q DC is not allowed if there exists t ? ? o such that ? d (q d , t) is defined but ? DC