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A blockchain-based auditable deduplication scheme for multi-cloud storage
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DOI：10.1007/s12083-024-01734-7.png)
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Abstract
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Cloud storage has attracted widespread attention due to its advantages such as convenience, low cost, and easy scalability. With the explosion of cloud data volumes, security and performance issues are becoming major concerns. Countermeasures like data deduplication and integrity auditing techniques have been extensively studied. However, traditional auditable deduplication protocols face significant challenges related to confidentiality, reliability, and efficiency. Aiming to address these challenges, a blockchain-based auditable deduplication scheme for multi-cloud storage is proposed in this paper. Specifically, this scheme leverages blockchain technology and bilinear pairing cryptosystem to achieve an auditable deduplication mechanism that not only saves storage space but also checks data integrity. Furthermore, convergent encryption and threshold secret sharing algorithms are utilized to enhance storage confidentiality and system reliability. Batch auditing and anti-repeated auditing techniques are also adopted to improve auditing efficiency. Finally, security analysis and performance evaluation reveal that the proposed scheme achieves the expected security and performance requirements.
Keywords:
Blockchain
Data auditing
Deduplication
Secret sharing
Multi-cloud storage
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