An efficient data flow material model based cloud authentication data security and reduce a cloud storage cost using Index-level Boundary Pattern Convergent Encryption algorithm

The storage and management of the huge data is solved by the cloud storage. The users can access the data whenever and wherever possibly in the cloud. The cloud storage provides convenient services for users. The problem of data security has been paid more and more attention at the same time. Based on the problems of the big data and the high repetition rate, this paper presents the improvement of the existing mainstream encryption algorithm. The algorithm can encrypt the same data, storied in different locations, into different ciphertexts, to make sure the data security in the case of the trusted cloud.

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A New User-controlled and Efficient Encrypted Data Sharing Model in Cloud Storage

Recent Patents on Engineering ◽

10.2174/1872212113666190215143537 ◽

2019 ◽

Vol 13 (4) ◽

pp. 356-363

Author(s):

Yuezhong Wu ◽

Wei Chen ◽

Shuhong Chen ◽

Guojun Wang ◽

Changyun Li

Keyword(s):

Data Sharing ◽

Data Security ◽

Cloud Storage ◽

Screening Program ◽

Original Data ◽

Third Party ◽

Active System ◽

Encrypted Data ◽

Active User ◽

User Data

Background: Cloud storage is generally used to provide on-demand services with sufficient scalability in an efficient network environment, and various encryption algorithms are typically applied to protect the data in the cloud. However, it is non-trivial to obtain the original data after encryption and efficient methods are needed to access the original data. Methods: In this paper, we propose a new user-controlled and efficient encrypted data sharing model in cloud storage. It preprocesses user data to ensure the confidentiality and integrity based on triple encryption scheme of CP-ABE ciphertext access control mechanism and integrity verification. Moreover, it adopts secondary screening program to achieve efficient ciphertext retrieval by using distributed Lucene technology and fine-grained decision tree. In this way, when a trustworthy third party is introduced, the security and reliability of data sharing can be guaranteed. To provide data security and efficient retrieval, we also combine active user with active system. Results: Experimental results show that the proposed model can ensure data security in cloud storage services platform as well as enhance the operational performance of data sharing. Conclusion: The proposed security sharing mechanism works well in an actual cloud storage environment.

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What If Keys Are Leaked? towards Practical and Secure Re-Encryption in Deduplication-Based Cloud Storage

Information ◽

10.3390/info12040142 ◽

2021 ◽

Vol 12 (4) ◽

pp. 142

Author(s):

Weijing You ◽

Lei Lei ◽

Bo Chen ◽

Limin Liu

Keyword(s):

Experimental Evaluation ◽

Cloud Storage ◽

Security Analysis ◽

Encrypted Data ◽

Cloud Data ◽

Storage Cost ◽

Outsourced Data ◽

Proof Of Ownership ◽

Client Side ◽

Over Time

By only storing a unique copy of duplicate data possessed by different data owners, deduplication can significantly reduce storage cost, and hence is used broadly in public clouds. When combining with confidentiality, deduplication will become problematic as encryption performed by different data owners may differentiate identical data which may then become not deduplicable. The Message-Locked Encryption (MLE) is thus utilized to derive the same encryption key for the identical data, by which the encrypted data are still deduplicable after being encrypted by different data owners. As keys may be leaked over time, re-encrypting outsourced data is of paramount importance to ensure continuous confidentiality, which, however, has not been well addressed in the literature. In this paper, we design SEDER, a SEcure client-side Deduplication system enabling Efficient Re-encryption for cloud storage by (1) leveraging all-or-nothing transform (AONT), (2) designing a new delegated re-encryption (DRE), and (3) proposing a new proof of ownership scheme for encrypted cloud data (PoWC). Security analysis and experimental evaluation validate security and efficiency of SEDER, respectively.

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