With the development of cloud computing,cloud storage services have been widely adopt-ed by various organizations,and users can easily share data with others.Under the premise that cloud users cannot fully trust cloud service providers,how to ensure the integrity of user-shared data in a cloud storage environment is one of the current research hotspots.In the shared data integrity audit scheme,existing schemes only consider malicious acts by cloud service providers and third-party au-ditors.However,in real life,group members can also be malicious,and they may try to modify data stored on cloud servers to the detriment of others.To solve this problem,a user credit record table is designed to evaluate the credit of group members,which can better prevent the malicious behavior of group members.A secure shared data integrity audit scheme is proposed,which uses blockchain tech-nology to store data modification records,which can be traced back to the user identity information of the modifier.In addition,the correctness,safety,and feasibility of the scheme are analyzed theoret-ically and experimentally.
NETL
NSTL
万方数据
