3 × 3 Security Model A model developed to normalize the security challenges within critical infrastructure, using a 3-row, 3-column mapping of critical infrastructure environments addressing asset complexity and capability along with vendor dependency.

Advanced Metering Infrastructure A modern, digital measurement, and communications infrastructure designed to enable more frequent measurements and to provide those measurements to various parties in real or near-real time. The advanced metering infrastructure typically consists of an AMI headend that provides meter data management and communication aggregation to smart meters (see “Smart Meters”).

Advanced Persistent Threat The advanced persistent threat (APT) refers to a class of sophisticated ...

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