Verifiable and Revocable Public-Key Searchable Encryption Scheme for Electrical Data

Smart grid is an important power network that involves the daily lives of billions of residents. However, privacy protection for residents is one of the key factors for the development and widespread application of smart grids. To ensure the privacy of electrical data, it is necessary to store and send residential data measured by electricity meters in encrypted form. Users with retrieval privileges can search the ciphertext in the control center, and the searchable encryption scheme will provide basic storage and search on them. However, user revocation is required in case of loss of user's key or termination of service. Therefore, this paper proposes a public-key searchable encryption that supports user retrieval with verification and revocation permission. The specific scheme combines the binary tree revocation algorithm with identity-based encryption to provide ciphertext verification and support user revocation. This scheme has better efficiency in both phases of keyword data encryption and ciphertext searching.