On the Security of a Public Auditing Protocol for Shared Data with Efficient User Revocation in the Cloud
FangChao Ma, Li Hechao, Hua Guo, Chunhe Xia · Advances in computer science research · 2015
Recently, Wang et.al. proposed a public auditing protocol with efficient user's revocation for shared data in the cloud storage (InfoCom 2013(InfoCom , 2904(InfoCom -2912)).By taking a careful look at the scheme, we noticed that their scheme has inherent limitations.In short, In short, the auditor cannot find the correct public key to verify those re-signatures which are converted from the original signatures.In this paper, we show a detailed weakness analysis on Wang et al.'s protocol, and propose a solution to remedy the weakness without sacrificing any desirable features of the mechanism.