随着云存储应用的普及, 云端数据安全成为影响用户体验的关键因素.传统保障云端数据安全的方式多为采用加密技术将云端存储的数据变成密文, 并结合一定的访问控制方案, 但访问控制方案在日常云存储系统中应用并不广泛, 且云存储软件功能单一, 无法满足用户对云端数据便捷修改、安全存储、安全共享等需求.针对上述问题, 本文提出了一种基于秘密共享技术的私有云存储方案, 并详细阐述了文件内容同步监控机制、用户间文件安全共享机制等关键技术.%With the popularity of cloud storage applications, cloud data security has become a key factor affecting user experience. In traditional method of securing cloud data, the data in the cloud is stored as cipher text by utilizing the encryption technology combined with the access control scheme. Due to the limited application of access control scheme in daily cloud storage system and function singleness of cloud storage software, the traditional method of securing cloud data lacks the capacity to meet the user demands for easily modifying, securely storing and securely sharing the cloud data. To address this problem, a private cloud storage solution based on the secret sharing technology is proposed in this paper, where some key technologies including file content synchronization monitoring mechanism and file security sharing mechanism among users are also presented in detail.
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