A privacy-preserving scheme with identity traceable property for smart grid

Smart city is a hot aim, and is organized gradually in many developed countries. People can understand the variation of city clearly via the collected data from sensors and RFID chips all over the city. As one of the most important applications for smart city, smart grid is a popular technology which has been already used in some developed countries. Wireless circumstance is the main way for the transmission data in collection process, and it is undoubtedly insecure. The problems that protecting the consumption data in smart grid and tracking some special users simultaneously are still open issues. We propose a novel scheme for smart grid involving three kinds of entities: Smart Meters (SMs), Electricity Utilities (EUs), and a Trustful Anchor (TA). In this scheme, SM encrypts the periodical consumptions and its identity, and sends the information to the relative electricity utility, and then EU can get the consumptions of smart meters in its scope. If necessary, TA may disclose the identities of the special smart meters. The security of this scheme is illustrated by formal proof and security property analysis. After expressions of performance and network simulation, it is easy to see that our scheme is suitable for practicality.