Ensuring the security of the nation's energy infrastructure is one of the primary challenges confronting the transition to the smart grid, and, for better or worse, it's up to utilities to serve as the foot soldiers of this effort. However, according to some experts, bolstering the defenses is of little use if you don't know what you're protecting. Before spending any money on security, they say, conduct a comprehensive inventory of all systems, components and networks to establish a perimeter that can subsequently be defended.

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