I. Introduction
Smart grid deployment initiatives have been witnessed in the recent past. The basic premise of moving to smart grid infrastructure is to manage energy efficiently. An important core network in a smart grid is Advanced Metering Infrastructure (AMI). AMI provides bi-directional communication between end devices at customers’ premises like smart meters and headend at utility provider's office. Headend system can remotely configure, upgrade, and request meter reading etc. using the AMI. This inherent criticality and availability of the AMI makes it a high potential target for the large-scale attacks that can potentially cause major regional blackout.