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dc.contributor.authorLin, Hsiao-Yingen_US
dc.contributor.authorTzeng, Wen-Gueyen_US
dc.date.accessioned2014-12-08T15:22:34Z-
dc.date.available2014-12-08T15:22:34Z-
dc.date.issued2012-06-01en_US
dc.identifier.issn1045-9219en_US
dc.identifier.urihttp://hdl.handle.net/11536/15965-
dc.description.abstractA cloud storage system, consisting of a collection of storage servers, provides long-term storage services over the Internet. Storing data in a third party's cloud system causes serious concern over data confidentiality. General encryption schemes protect data confidentiality, but also limit the functionality of the storage system because a few operations are supported over encrypted data. Constructing a secure storage system that supports multiple functions is challenging when the storage system is distributed and has no central authority. We propose a threshold proxy re-encryption scheme and integrate it with a decentralized erasure code such that a secure distributed storage system is formulated. The distributed storage system not only supports secure and robust data storage and retrieval, but also lets a user forward his data in the storage servers to another user without retrieving the data back. The main technical contribution is that the proxy re-encryption scheme supports encoding operations over encrypted messages as well as forwarding operations over encoded and encrypted messages. Our method fully integrates encrypting, encoding, and forwarding. We analyze and suggest suitable parameters for the number of copies of a message dispatched to storage servers and the number of storage servers queried by a key server. These parameters allow more flexible adjustment between the number of storage servers and robustness.en_US
dc.language.isoen_USen_US
dc.subjectDecentralized erasure codeen_US
dc.subjectproxy re-encryptionen_US
dc.subjectthreshold cryptographyen_US
dc.subjectsecure storage systemen_US
dc.titleA Secure Erasure Code-Based Cloud Storage System with Secure Data Forwardingen_US
dc.typeArticleen_US
dc.identifier.journalIEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMSen_US
dc.citation.volume23en_US
dc.citation.issue6en_US
dc.citation.epage995en_US
dc.contributor.department資訊工程學系zh_TW
dc.contributor.departmentDepartment of Computer Scienceen_US
dc.identifier.wosnumberWOS:000303207700003-
dc.citation.woscount14-
Appears in Collections:Articles


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