Design Of Privacy Protection Scheme On Smart Meter

As a new generation of electric power network, the smart gridcan make use of users’ real-time smart metering data to monitor and predict operation state of power grid. However the smart metering data also poses a threat to the privacy of people living since it contains very sensitive information about customers. How to protect users’ privacy in the smart grid has become a research hotspot in recent years. But the existing schemes for privacy protectionof smart metering mainly focused on data processing, which mostly involves in homomorphic encryption algorithm. Therefore, the efficiency of encryption algorithm directly affects the performance of the scheme.To solve above problems,a privacy protection scheme on smart meter is designed in this thesis. Firstly, a smart meter security terminal module is proposed, which resists external attacks and implements cryptographic operations without disclosing any data and key.Then, an improved Paillier algorithm is introduced to reduce the computational complexity and improve the efficiency of the algorithm without reducing the security. Moreover, the privacy protection scheme of smart meter is proposed which is based on improved Paillier algorithm,data aggregation algorithm SMART and aggregated signature OTIBAS. Through this scheme, the massive data between smart meters and master station are transmitted safely and the customer’s privacy is preserved. Finally,the comparison of the running efficiency between the original algorithm and improved algorithm is realized by simulation. And the analysing the performance of the scheme which is proposed in this thesis and the other two schemes shows thatthe scheme which is proposed in this thesis in the communication overhead and computational overhead is better.