A Data Integrity Verification Scheme of Deduplication for Cloud Ciphertexts

Cloud data deduplication can save cloud storage resources and network communication bandwidth, and improve cloud storage efficiency. A series of deduplication technologies are proposed to achieve cloud data deduplication. However, the traditional deduplication scheme mainly implements data deduplication without providing data integrity verification, so it cannot be verified whether the CSP correctly stores user data. This paper proposes a data integrity verification scheme of deduplication for cloud ciphertexts, including cloud ciphertext deduplication and cloud data integrity verification. In the data integrity verification, the proxy re-signature method is adopted. In addition, our scheme realizes user revocation, ensures the privacy of cloud data, and satisfies unforgeability of tags. Performance analysis results show that it has higher efficiency than similar schemes.