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Passcode speaks to security experts like Joe Weiss, who claims to have a list of around 400 incidents in which failures in software and electronic communications lead to a failure of confidentiality, integrity or availability (CIA) — the official definition of a cyber incident. Few of them are considered cyber incidents within critical infrastructure circles, however. His list includes some of the most deadly and destructive public sector accidents of the last two decades. Among them: a 2006 emergency shutdown of Unit 3 at the Browns Ferry nuclear plant in Alabama, the 1999 Olympic Gas pipeline rupture and explosion in Bellingham Washington that killed three people and the 2010 Pacific Gas & Electric gas pipe explosion in San Bruno, Calif., that killed eight people and destroyed a suburban neighborhood.
While official reports like this one about the San Bruno pipeline explosion (PDF) duly note the role software failure played in each incident, they fail to characterize them as 'cyber incidents' or note the cyber-physical aspects of the adverse event. Weiss says he has found many other, similar omissions that continue even today. He argues that applying an IT mindset to critical infrastructure results in operators overlooking weaknesses in their systems. "San Bruno wasn't malicious, but it easily could have been," Weiss notes. "It's a nonmalicious event that killed 8 people and destroyed a neighborhood."