CP-ABE-based weight attribute encryption system

The invention discloses a CP-ABE-based weight attribute encryption system, and the system comprises a data owner which generates an access control structure based on an access control strategy, encrypts a file according to the access control structure, and uploads the encrypted file to a cloud server; the data consumer can download the ciphertext data stored in the cloud and decrypt the ciphertext data according to a decryption algorithm to obtain a plaintext file; an authorization mechanism configured to generate a public key or a private key based on a data owner or a data consumer request; and a cloud server configured to provide a computing service to the data owner and the data consumer. By introducing an LSSS access control structure and constructing a weight access control matrix, greater, smaller and interval attributes can be efficiently expressed, the flexibility of attribute expression is improved, the security is enhanced, and an effective solution strategy is provided for secure transmission and