期刊名称：International Journal of Electronics Communication and Computer Engineering
印刷版ISSN：2249-071X
电子版ISSN：2278-4209
出版年度：2013
卷号：4
期号：4
页码：1119-1123
出版社：IJECCE
摘要：Cloud computing techniques are used to share resources. It transfers the application software and databases to the centralized large data centers. Storing important data with cloud storage providers comes with serious security risks. The cloud can leak confidential data, modify the data, or return inconsistent data to different users. So, the cloud data security requires authentication and integrity analysis for the storage data values. An erasure code provides redundancy by breaking objects up into smaller fragments and storing the fragments in different places. The key is that you can recover the data from any combination of a smaller number of those fragments. With threshold proxy re-encryption scheme (PRE) , 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. It meets the requirements that storage servers independently perform encoding and re-encryption and key servers independently perform partial decryption. The system user forwards his data in the storage servers to another user without retrieving the data back. A major feature of the cloud services is that user’s data are usually processed remotely in unknown machines that users do not own or operate. Conditional Proxy Re-Encryption (C-PRE) is proposed, whereby user has a fine-grained control over the delegation. As a result, user can flexibly assign her delegate, and decryption capability based on the conditions attached to the messages, using a proxy with no higher trust than in existing PRE schemes.
关键词：C PRE; Decentralized Erasure Code; Distributed Storage; PRE
