Cloud computing data security access control model using improved CP-ABE algorithm

Abstract

The current cloud computing data security access control model reduces the risk of data being maliciously modified, but it can't change the local attributes, and lacks some flexibility in the dynamic update of permissions. An improved CP-ABE algorithm is applied to design a cloud computing data security access control model. Between the cloud computing server and data users, a collaborative private key management mode is established based on the single attribute authority architecture. Each user has the attribute set and the corresponding private key. The CP-ABE algorithm cannot revoke the authority of a single user. A revocation scheme is added to the CP-ABE algorithm. The data belongs to the master, changes the hidden cloud key and authorized user attributes, and updates the private key with new random parameters. The improved CP-ABE algorithm is applied to establish the access control model. After the user accesses, the public key is obtained, and the input public and private keys are converted by the conversion algorithm. The test results show that the design model can reduce the time of key encryption and decryption when increasing the number of user attributes, complete data security access with less energy consumption, and is conducive to the expansion of access attributes.