期刊名称：International Journal of Advanced Research in Computer Engineering & Technology (IJARCET)
印刷版ISSN：2278-1323
出版年度：2018
卷号：7
期号：3
页码：351-361
出版社：Shri Pannalal Research Institute of Technolgy
摘要：Today, cloud storage becomes one of the critical services, because users can easily modify and share data with others in cloud. However, the integrity of shared cloud data is vulnerable to inevitable hardware faults, software failures or human errors. To make sure the integrity of the shared data, some schemes have been invented to allow public verifiers (i.e., third party auditors) to efficiently audit data integrity without retrieving the entire users’ data from cloud. Unfortunately, public auditing on the integrity of shared data may reveal data owners’ sensitive information to the third party auditor. In this paper, we suggest a new privacy-aware public auditing mechanism for shared cloud data by establishing a homomorphic verifiable group signature. Unlike the existing solutions, our scheme requires at least t group managers to recover a trace key cooperatively, which eliminates the abuse of single-authority power and provides non-frameability. Moreover, our scheme make sure that group users can trace data changes through designated binary tree; and can recover the latest correct data block when the current data block is damaged. Moreover, the formal security analysis and experimental results show that our scheme is sustainably secure and cost-effective.
