Back in 60's New York a 24-hour blackout caused, because of electric fuel pump failure, almost all the emergency services to stop running. Our networks today are many times more complex and inter-related. There could be people trying to disrupt these. Einstein is quoted to have said 'God may be complex but he is not mean'. People involved in this kind of espionage make the process of protecting these systems incredible complicated because they malicious intent and adapt maneuver to counter maneuver.
Encryption protects data on the move but that is a small part of the problem.
Firewalls are part of a perpetual race similar to jamming and resisting jamming in wartime communications. Firewall defense systems need constant updating in a race to stay ahead of attackers. Governments and Industry are searching for new techniques and tactics to be used in this battle. This policy for individuals reflected the FBI-NIPC initiative 'InfraGard' for nations. Wolsey now continues his career as a lawyer in private practice.