Reliable and confidential cloud storage with efficient data forwarding functionality

Cloud computing is a promising computing paradigm which has drawn extensive attention. Serious concerns over the reliability and confidentiality of the outsourced data are arising. Traditional encryption methods can, guarantee data confidentiality, however, it also limits the cloud's functional...

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Bibliographic Details
Published in:IET communications Vol. 10; no. 6; pp. 661 - 668
Main Authors: Liu, Jian, Wang, Huimei, Xian, Ming, Rong, Hong, Huang, Kun
Format: Journal Article
Language:English
Published: The Institution of Engineering and Technology 14.04.2016
Subjects:
Algorithms
all‐or‐nothing‐transform‐based encryption
Blending
cipher data
Cloud computing
confidential cloud storage
confidentiality
Construction
cryptography
data forwarding functionality
Data storage
ElGamal‐based proxy re‐encryption algorithm
Encryption
encryption method
file dispersal
file retrieval
Performance evaluation
Reed-Solomon codes
Reed‐Solomon code
reliability
reliable cloud storage
robust data storage
storage management
reliable cloud storage
reliability
confidentiality
cryptography
data forwarding functionality
file retrieval
confidential cloud storage
ElGamal-based proxy re-encryption algorithm
robust data storage
Reed-Solomon code
encryption method
Reed-Solomon codes
storage management
cipher data
file dispersal
cloud computing
all-or-nothing-transform-based encryption
ISSN:1751-8628, 1751-8636
Online Access:Get full text
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Summary:Cloud computing is a promising computing paradigm which has drawn extensive attention. Serious concerns over the reliability and confidentiality of the outsourced data are arising. Traditional encryption methods can, guarantee data confidentiality, however, it also limits the cloud's functionality as few operations are supported over encrypted data. In this study, the authors construct an enhanced cloud that not only provides secure and robust data storage, but also supports the functionality that the cipher data can be forwarded without being retrieved back. Specifically, they design an all-or-nothing-transform-based encryption and a variant of ElGamal-based proxy re-encryption algorithms, blending them with Reed–Solomon code, the authors’ scheme is quite more efficient compared with previous studies because it only needs to update partial data blocks instead of the whole file for data forwarding. Besides, the authors’ scheme also satisfies another practical property that the original data owner can no longer decrypt or forward the re-encrypted data to others after a complete forwarding instance, which is termed to be ‘original inaccessibility’ in this study. Analysis shows that the authors’ scheme is secure and satisfactory. Finally, the authors theoretically and experimentally evaluate its performance and the results indicate that their scheme is efficient during file dispersal, forward and retrieval.
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ISSN:1751-8628
1751-8636
DOI:10.1049/iet-com.2015.0608