The power grid is a important infrastructure that must be protected against potential threats because most of the economic actions rely on it. But the whole world turns to be smarter, the power grid advance to a smart grid which has better efficiency. Since smart grid involves both power system infrastructure and Information technology structure, there is more chance of rise in coming out of new attack vectors exploits increasing system difficulty. While security (against malicious attacks) is an important issue for grid operators, real-world constraints such as resource limitations...