Multi-dimensional data aggregation method based on bilinear ElGamal cryptosystem

The invention discloses a multi-dimensional data aggregation method based on a bilinear ElGamal cryptosystem. The method comprises the steps that a control center generates a public and private key pair for encryption and signature by using a bilinear ElGamal cryptosystem; each user carries out ciphertext and signature calculation on multi-dimensional electricity consumption information by using a super-incremental sequence, and sends a ciphertext and a signature to a fog node; after receiving encrypted user electricity utilization information, the fog node generates an aggregation ciphertext and an aggregation signature, and then sends the aggregation ciphertext and the aggregation signature to the control center; and after receiving the aggregation ciphertext and the aggregation signature, the control center verifies the aggregation signature and decrypts the aggregation ciphertext to finally obtain an aggregation result of the electricity consumption information of each dimension. According to the method,