Data query method and device based on proxy re-encryption, storage medium and equipment

The embodiment of the invention relates to a data query method and device based on proxy re-encryption, a storage medium and equipment, and relates to the technical field of information security. The method comprises the following steps: receiving ciphertext data and a re-encryption key sent by a data provider; the data provider is used for generating a public key and a private key, generating a re-encryption key and a decryption key based on the private key, and sending the decryption key to the data query party; the public key is used for encrypting data to obtain ciphertext data; receiving a query request sent by a data query party, and determining a ciphertext query result based on the query request; and re-encrypting the ciphertext query result by adopting the re-encryption key according to a preset re-encryption algorithm to obtain a re-encrypted query result, and sending the re-encrypted query result to the data query party, so that the data query party decrypts the re-encrypted query result by adoptin