Anti-quantum attribute-based encryption method and system for cross-domain data sharing

Abstract

The invention discloses an anti-quantum attribute-based encryption method and system for cross-domain data sharing, and relates to the technical field of industrial internet information security, the method comprises the following steps: step 1, authorization centers of a data sharing domain and a data access domain generate respective common parameters and master keys; 2, the authorization center of the data access domain generates an attribute private key; step 3, the data owner performs offline encryption to generate a pre-encrypted ciphertext; step 4, the data owner carries out online encryption to generate a symmetric ciphertext and a key ciphertext; 5, the data applicant sends a data access request to the authorization center of the data access domain where the data applicant is located; step 6, the authorization center of the data access domain executes a cross-domain access verification contract, and verifies whether the attribute name of the data owner meets the access strategy in the key ciphertext; step 7, generating a conversion key; step 8, generating a conversion ciphertext; step 9, testing; step 10, decrypting to obtain a plaintext; and 11, carrying out attribute revocation.

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