In response to the privacy and security issues of a large amount of user charging data brought by the rapid development of new energy vehicles, this paper proposes a multi-level charging spot data encryption method that combines K-anonymity with advanced encryption standard (AES). The K-anonymity algorithm is used to privacy process the charging spot data. In order to improve the security of data during transmission, the AES algorithm is used to encrypt the privacy treated data. To enhance the security of the symmetric encryption algorithm, the asymmetric encryption rivest-shamir-adleman (RSA) algorithm is used to encrypt the AES key. The secure hash algorithm (SHA)-256 is used to verify whether the data has been tampered during transmission. The implementation results show that the multi-level charging spot data encryption method proposed in this paper can achieve high privacy and security effects. Compared with the triple data encryption standard (Triple DES) algorithm, the encryption time is significantly reduced by 12.12%, proving the applicability and efficiency of the proposed method.
