Research On Cloud Storage Ciphertext Security Deduplication Technology

With the development of cloud computing technology,it is widely used in people's daily life and work.In order to conveniently save and share data,many people choose to upload the data to the cloud for storage.However,there are still some problems in the existing cloud storage environment,such as how to implement efficient data cipher text deduplication in the cloud storage server to enhance the utilization of storage space,and how to ensure that the user's data on the cloud storage side is complete and not damaged.In order to solve these problems,cloud storage ciphertext data security deduplication technology and cloud storage data integrity verification technology have been proposed.However,some existing schemes still have some shortcomings.To this end,this paper researches on the cloud storage ciphertext data security deduplication technology and the cloud storage ciphertext data security deduplication technology that supports integrity verification,propose two efficient cloud storage ciphertext security deduplication schemes.1.Improved efficient cloud storage ciphertext security deduplication schemeAiming at the shortcomings of some existing data security deduplication technologies,this paper proposes a new and efficient cloud storage ciphertext security deduplication scheme.Our scheme uses multiple Hash functions to fix the number of power operations in the data block label generation process,reducing the calculation overhead of label generation;and constructing a label decision tree structure and label comparison algorithm,reducing the number of duplicate detection comparisons.Then we analyze the scheme's correctness and security.In the security analysis,we proved that the scheme meets the PRV$-CDA security model.Finally,experimental data shows that the computational overhead required by this scheme is small,and the results show that this scheme can better meet the actual cloud storage requirements.2.Cloud storage ciphertext security deduplication scheme with supporting integrity verificationAiming at the problem that the existing cloud storage ciphertext deduplication technology that supports integrity verification has a large calculation overhead,this paper proposes a new and more efficient scheme.Our scheme combines message-locked encryption structure and efficient integrity verification scheme using a homomorphic message authentication code structure to achieve efficient data deduplication and integrity verification.Subsequently,perform the correctness and security analysis of the scheme,and proved the correctness and security of each link of the scheme.Various analyses have shown that this scheme is efficient and secure,and it better meets the actual cloud environment requirements.