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標題Title: uCloud: a user-centric key management scheme for cloud data protection
作者Authors: 徐苡庭
上傳單位Department: 資訊工程系
上傳時間Date: 2013-12-30
上傳者Author: 徐苡庭
審核單位Department: 資訊工程系
審核老師Teacher: 李南逸
檔案類型Categories: 課堂報告In-class Report
關鍵詞Keyword: 1
摘要Abstract: Abstract: One of the most challenging problems of cloud service solicitation is to persuade users to trust the security of cloud
service and upload their sensitive data. Although cloud service providers can claim that their services are well-protected by
elaborate encryption mechanisms, traditional cloud systems still cannot persuade the users that even if the cloud servers are
compromised, the data are still securely protected. This study proposes uCloud, a user-centric key management scheme for
cloud data protection, to solve this problem. uCloud utilises RSA and indirectly encrypts users’ data by users’ public keys,
but stores the users’ private keys on neither servers nor users’ PCs; instead, the private keys are stored on users’ mobile
devices and presented via two-dimensional (2D) barcode images when they are utilised to decrypt users’ sensitive data. In
this manner, users’ data are safely protected even if the cloud servers are compromised. Also, uCloud provides users with the
experience of managing visible private keys by storing the keys into mobile phones and displaying them via 2D barcodes.
Moreover, three scenarios: personal storage, home surveillance and enterprise storage scenarios are proposed to present the
practicability of uCloud. In addition, a hierarchical structure is designed for basic key backup and data sharing in the
proposed scheme.

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