Research on Multi-user Access Control Scheme for Private Cloud in Space Control Center

The attribute-based encryption (ABE) mechanism enables fine-grained access control of sensitive data and data encryption. The ciphertext-policy ABE (CP-ABE) based on the ideal lattices has the advantages of small private key length and high computational efficiency. Aiming at the multi-task parallel and multi-user access of Space Control Center, this paper analyzes the multi-user data access mode and data encryption key structure of Space Control Center and proposes a kind of ABE access control scheme based on ideal lattice in private cloud for Space Control Center. This paper also designs s targeted direct attribute revocation mechanism. Security analysis and program comparison were carried out. The analysis shows that the scheme can meet the multi-user access control requirements of Space Control Center, and the access control granularity meets the actual situation.