scholarly journals Symmetric Encryption Algorithm to Secure Outsourced Data in Public Cloud Storage

2015 ◽  
Vol 8 (23) ◽  
Author(s):  
Ramalingam Sugumar ◽  
Sharmila Banu Sheik Imam
Keyword(s):  
Cloud Storage ◽  
Encryption Algorithm ◽  
Symmetric Encryption ◽  
Public Cloud ◽  
Outsourced Data

scholarly journals An effective, secure and efficient tagging method for integrity protection of outsourced data in a public cloud storage

PLoS ONE ◽  
2020 ◽  
Vol 15 (11) ◽  
pp. e0241236 ◽  
Author(s):  
Reem ALmarwani ◽  
Ning Zhang ◽  
James Garside
Keyword(s):  
Cloud Storage ◽  
Security Analysis ◽  
Third Party ◽  
Public Cloud ◽  
Data Confidentiality ◽  
Public And Private ◽  
Outsourced Data ◽  
Integrity Protection ◽  
And Performance ◽  
Constrained Devices

Data Integrity Auditing (DIA) is a security service for checking the integrity of data stored in a PCS (Public Cloud Storage), a third-party based storage service. A DIA service is provided by using integrity tags (hereafter referred to tags). This paper proposes a novel tagging method, called Tagging of Outsourced Data (TOD), for generating and verifying tags of files. TOD has a number of unique properties: (i) it supports both public and private verifiability, and achieves this property with a low level of overhead at the user end, making it particularly attractive to mobile users with resource-constrained devices, (ii) it protects data confidentiality, supports dynamic tags and is resilient against tag forgery and tag tampering (i.e. by authorised insiders) at the same time in more secure and efficient, making the method more suited to the PCS environment, (iii) it supports tags deduplication, making it more efficient, particularly for the user who has many files with data redundancy. Comprehensive security analysis and performance evaluation have been conducted to demonstrate the efficacy and efficiency of the approach taken in the design.

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

Information ◽  
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.

scholarly journals Co-Check: Collaborative Outsourced Data Auditing in Multicloud Environment

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Jian Mao ◽  
Wenqian Tian ◽  
Yan Zhang ◽  
Jian Cui ◽  
Hanjun Ma ◽  
...  
Keyword(s):  
Communication Networks ◽  
Resource Sharing ◽  
Cloud Storage ◽  
Low Cost ◽  
Data Outsourcing ◽  
Daily Lives ◽  
Outsourced Data ◽  
Low Performance ◽  
Increasing Demand ◽  
Data Auditing

With the increasing demand for ubiquitous connectivity, wireless technology has significantly improved our daily lives. Meanwhile, together with cloud-computing technology (e.g., cloud storage services and big data processing), new wireless networking technology becomes the foundation infrastructure of emerging communication networks. Particularly, cloud storage has been widely used in services, such as data outsourcing and resource sharing, among the heterogeneous wireless environments because of its convenience, low cost, and flexibility. However, users/clients lose the physical control of their data after outsourcing. Consequently, ensuring the integrity of the outsourced data becomes an important security requirement of cloud storage applications. In this paper, we present Co-Check, a collaborative multicloud data integrity audition scheme, which is based on BLS (Boneh-Lynn-Shacham) signature and homomorphic tags. According to the proposed scheme, clients can audit their outsourced data in a one-round challenge-response interaction with low performance overhead. Our scheme also supports dynamic data maintenance. The theoretical analysis and experiment results illustrate that our scheme is provably secure and efficient.

Role of acquisition intervals in private and public cloud storage costs

2014 ◽  
Vol 57 ◽  
pp. 320-330 ◽  
Author(s):  
Gabriella Laatikainen ◽  
Oleksiy Mazhelis ◽  
Pasi Tyrväinen
Keyword(s):  
Cloud Storage ◽  
Public Cloud ◽  
Private And Public

Multi-User Verifiable Searchable Symmetric Encryption for Cloud Storage

2020 ◽  
Vol 17 (6) ◽  
pp. 1322-1332 ◽  
Author(s):  
Xueqiao Liu ◽  
Guomin Yang ◽  
Yi Mu ◽  
Robert H. Deng
Keyword(s):  
Cloud Storage ◽  
Symmetric Encryption ◽  
Searchable Symmetric Encryption
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