The integration of the information network into the energy system is the key to realising the vision of the intelligent network, but it also introduces many security problems. Wireless communication offers the benefits of low cost, rapid deployment, shared communication and mobility; at the same time, it causes many problems of security and privacy.
Since the advent of the intelligent network concept, security has always been a primary concern. Price information and control actions are transmitted through the information network. Various attacks such as espionage, manipulation of information and the injection of malicious control commands that have almost ruined the Internet would impose a serious threat to the operation of secure and stable smart networks. In addition, SG is an attractive target for various hackers with diverse motivations, eg. unethical clients may want to modify their meter readings to avoid electrical charge; malicious users are able to extract behaviors from the home by secretly listening to the communications of smart meters (called monitoring non-intrusive device load); vicious terrorists want to inject the fake data or command to disrupt the network. The US National Standards and Technology Institute sets guidelines for developers and policy makers, covering the cyber security requirements of smart grids that must be included from the beginning of the development process. In the Cisco Smart Grid Framework, concern for security plays the role in all functional components.