Comments on a privacy preserving public auditing mechanism for shared cloud data
Tsu‐Yang Wu, Yueshan Lin, King-Hang Wang, Chien‐Ming Chen, Jeng‐Shyang Pan, Mu‐En Wu · 2017
Auditing mechanisms are received much attentions from researchers due to the developing of cloud storage. Recently, Wang et al. proposed a privacy preserving public auditing mechanism for shared cloud data with supporting group dynamic. However, we find some security flaws in their mechanism. In this paper, a forgery attack and a data corruption attack are proposed to demonstrate the insecurity. Then, we propose a modified scheme based on their mechanism. The security analysis is demonstrated that our improvement can resist the mentioned two attacks.