Abstract: The old scheme for secure and efficient public dynamic public data integrity auditing for shared dynamic data is not still secure. Here in this paper we present collusion attack in existing scheme. Also it provides efficient public integrity auditing scheme. There is efficient use of vector commitment and verifier local revocation group signature. We implement concrete scheme for group signature. The scheme support public checking, efficient user revocation, and properties like confidently, efficiency, count ability and traceability. Finally we compare our scheme with old which shows good result in security.

Keywords: Public integrity auditing, dynamic data, vector commitment, group signature, cloud computing.