Cloud storage integrity detection method for recovering lost secret keys and system applying cloud storage integrity detection method

Abstract

The invention provides a cloud storage integrity detection method for recovering lost secret keys, and a system applying the cloud storage integrity detection method. The system comprises a parameter generation center module, a cloud module, a secret key distribution center module, a group member module and an audit center module. Through the adoption of the system, when the secrete keys of members in a group are lost, the conditions that new secrete keys are regenerated and signatures are regenerated for part of data can be avoided; the secrete keys can be verified, namely, each member in the group can verify whether the secrete key sent by a secrete key distribution center is correct or not, and the user of which the secrete key is lost can also verify whether the share, sent by other t+1 members in the group, is correct or not, so as to avoid the condition that the secret key distribution center or the user distributing the share to the user of which the secrete key is lost is dishonest; when the secrete keys are recovered, the secrete keys of the members are blinded, so that all the members do not know the secrete keys of the others. Therefore, the secrete key recovering safety is improved, and a cloud is prevented from being framed by malicious users.

Description

technical field [0001] The invention relates to the technical field of cloud storage security, in particular to a cloud storage integrity detection method and system capable of recovering lost keys. Background technique [0002] In recent years, with the rapid development of Internet technology and the increasing number of cloud service providers, cloud computing services have entered people's lives more and more deeply, and data storage in the cloud has also become a hot spot of concern. Today, with the development of the network and the advancement of technology, a large number of interactive applications and massive data will be generated in life, and these data require a large amount of software and hardware for storage and calculation, and the maintenance cost of the data is very high. As an important application form of cloud computing, cloud storage can provide low-cost and convenient large-scale storage services to store and manage data for users. Users can use serv...

AI Technical Summary

Problems solved by technology

In the shared data group, the key of the group member may be lost and cannot be recovered due to hardware failure, loss of mobile device, etc. If the traditional method is used, a new key needs to be redistributed to the member whose key is lost, and then It is necessary to download all the data of this user from the cloud and re-sign the data with a new key, otherwise there will be security issues

However, this will cost intolerable computational and communication overheads and cannot be applied to cloud storage environments

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