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Security through obscurity is not unacceptable because our power systems are being networked, it's unacceptable because it's not secure. Obscurity does not prevent the determined from discovering and exploiting vulnerabilities, even in systems that are not networked, as Stuxnet demonstrated.

What obscurity does do is prevent the type of transparency and cooperation that has fostered the active Internet security community that drives advances in security for IP-based systems. As a result, obscurity can actually hinder security.