Assured Data Deletion with Multi-authority Attribute-based Encryption for Cloud Data
The use of cloud storage services is becoming more and more common,but a large amount of data is saved in the third-party cloud server,which brings convenience to users but also puts forward higher security requirements.Since the cloud storage service is semi-trusted,how to delete cloud storage data deterministically becomes a problem that needs to be solved.At present,most of the research on assured deletion of cloud storage data is based on attribute-based encryption of single authority management attributes.Although this kind of solution meets the fine-grained access control of cloud data,it is easy to cause single point of failure and other problems.Therefore,,we propose a cloud storage data assured deletion scheme based on multi-authority attribute-based encryption.The application of multi-authority attribute-based encryption in this scheme not only supports the secure deletion of cloud storage data when there are multiple authority to manage attributes,but also realizes fine-grained access to cloud data.In addition,this scheme protects the privacy of access policies stored in the cloud server by using policy hiding.Finally,cloud data deletion is realized by changing the ciphertext through revocation attributes,and the deletion result is publicly verifiable and responsibility traceable through the blockchain storage deletion proof.Experimental simulation and comparative analysis show that the proposed scheme has high security in cloud storage data deletion,and provides a practical scheme for cloud storage data deletion.
国家科技期刊平台
NSTL
万方数据
维普
