Homomorphic Encryption-Based Data Integrity Verification and Anti-Tampering Mechanism in Cloud Storage Environment

To enhance the integrity assurance of encrypted data in cloud storage environments, a homomorphic encryption-based data remote verification and anti-tampering mechanism is proposed. The design incorporates a homomorphic verification protocol to enable consistency checks of data blocks in the encrypted domain, and combines a lightweight tag structure with a Merkle Hash Tree to support dynamic data operations, including insertion, modification, and deletion. Corrective codes and tag version control are employed to enable rapid data recovery following tampering detection. Additionally, attribute-encryption-based access control and a blockchain auditing mechanism are integrated to strengthen the system's security closed-loop. Analysis shows that the mechanism offers strong scalability with low computational and communication overhead while preserving data privacy, making it suitable for trusted data storage in multi-user cloud environments.