Support revoking outsourcing verifiable multi-authorization center access control method, cloud server

Abstract

The invention belongs to the technical field characterized by protocols, and discloses an access control method and a cloud server that support the cancellation of outsourcing and verifiable multi-authorization centers, including: system initialization, including the initialization of the global authentication center and other authorization centers; the authorization center is the user Assign the attribute set and generate the key required for decryption; the data owner encrypts the file, and the encryption process includes outsourcing encryption, verification of the outsourcing result and the final encryption of the data owner; the user issues a file access to the cloud service provider Request, the process includes outsourcing decryption by the cloud service provider, verification of outsourcing results, and final decryption by users; revoking certain users or certain attributes in the system. The invention has the advantages of high system access efficiency, low calculation overhead, and supports dynamic user authority management, and can be used in cloud storage to ensure the security of user privacy data, reduce user calculation overhead, and dynamically manage user authority in the system.

Description

technical field [0001] The invention belongs to the technical field characterized by protocols, and in particular relates to an access control method and a cloud server that support revoking outsourcing verifiable multi-authorization centers. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: With the continuous development of information technology, people's life has been greatly improved. Among them, the rapid development of cloud computing has attracted widespread attention. Cloud computing is an entity with huge computing and storage capabilities. It is the product of the combination of network storage, virtualization, load balancing, distributed computing, parallel computing, utility computing and other traditional computing technologies and network technology development. Its power is that it can dynamically distribute computing resources to users through the network. At the same time, users can also sto...

AI Technical Summary

Problems solved by technology

In addition, the access control technology based on attribute encryption will also bring a huge management burden, especially the problem of revocation has always been difficult

In addition, if permissions are revoked frequently, the computational burden will be heavy, and the dynamic nature of attributes increases the overhead and difficulty of key updates.

Most existing technologies are not efficient enough to support flexible revocation of users and attributes in cloud storage systems. Therefore, it is necessary to propose an access control method that supports revocation outsourcing and verifiable multiple authorization centers

[0003] In summary, the problems in the prior art are: The existing technologies are not efficient enough, and do not support flexible revocation of users and attributes in the cloud storage system; the calculation complexity is high, the overhead is large, and revocation is difficult

[0004] The difficulty and significance of solving the above technical problems: Access control technology based on attribute encryption will also bring a huge management burden, especially the problem of revocation has always been difficult

In addition, if permissions are revoked frequently, the computational burden will be heavy, and the dynamic nature of attributes increases the overhead and difficulty of key updates.

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