- 期刊
An Efficient Attribute Encryption Scheme with Privacy-Preserving Policy in Smart Grid
摘要
The smart grid is a new generation of power systems. The power information is generally collected through smart meters installed in homes and power monitors deployed outdoors; this massive amount of information will be stored in a smart cloud. Unfortunately, cloud computing scenarios are prone to leaking private information, hurting security. Ciphertext Policy-Attribute Based Encryption (CP-ABE) is a vital encryption technology for access control in smart grid scenarios. However, the access policy in attribute encryption is generally in plain text, which risks leaking sensitive information and requires a large amount of computation. This paper proposes an efficient and more privacy-preserving weighted attribute encryption method based on a ciphertext strategy for the smart grid. We completely hide the access policy, adopt online/offline encryption, and outsource decryption to reduce the amount of computation. We use the analytic hierarchy process (AHP) to assign appropriate weights to each attribute, providing fine-grained and flexible access control by adopting the Linear Secret Sharing Scheme (LSSS) access control mechanism. The analysis shows that while ensuring security, our scheme will also reduce the computational and communication overhead and is closer to the actual situation, which is suitable for application in cloud computing.