Smart Grid is Digital Control Framework that comprises of two-way correspondence infrastructure, IT system, Advance sensor, & Advance Electrical power distribution for the smart state. The gadget controlled in intelligent homes has installed smart meters in apparatuses. They are sensor/based and arrange empowered. As usual, security and safety issues are of prime importance since it includes private information from the HAN. This proposes a safe plan for HAN and some important security in utility system. In this paper overview on brilliant lattice Security mechanism and related Attack for occur in home area network.