摘要
Remote data auditing becomes critical to ensure the storage reliability in distributed cloud storage.Recently,Le et al proposed an efficient private data auditing scheme NC-Audit designed for regenerating codes,which claimed that NC-Audit can effectively realize privacy-preserving data auditing for distributed storage systems.However,our analysis shows that NC-Audit is not secure for that the adversarial cloud can forge some illegal blocks to cheat the auditor successfully with a high probability even without storing the user’s whole data,when the coding field is large enough.
基金
Supported by the National Natural Science Foundation of China(61872088)
the Science and Technology Plan Project of Xi’an(2020KJWL02,2017CGWL35)
the China National Study Abroad Fund。