Abstract:The rapid development of cloud storage services also brings many security challenges. The existing fuzzy identity-based data integrity auditing scheme only focuses on static data, which is obviously not suitable for many practical applications. This study proposes a fuzzy identity-based dynamic data integrity auditing scheme, which combines the dynamic data structure of Merkle hash tree to realize the complete dynamic operations of cloud data. Compared with data integrity auditing schemes based on the public key infrastructure, the scheme avoids the processes of issuing, managing, and revoking public key certificates by using fuzzy identity-based cryptosystem, and reduces the communication cost. Furthermore, the proposed scheme supports batch verification and improves authentication efficiency. Finally, the new scheme is analyzed in terms of security and function, which resists forgery attack and preserves data privacy, and has certain advantages over other schemes in terms of function.