MILWAUKEE - Power outages. Crashed government service websites. Pilfered personal information from corporate or government databases. A world increasingly interconnected through the Internet also provides numerous opportunities for individuals or groups to visit malice or mischief upon people, businesses, utilities and government agencies. The focus of Wisconsin's third annual Cybersecurity Summit was defending the state's operational infrastructure, such as power grids, information databases, communication networks and utilities. But an underlying theme was expanding knowledge of the adversary, of one's own weaknesses, and the difference between an attack and a routine system scan. Gov. Scott Walker opened the summit by noting that cybersecurity has only become more important over the past two years.