Data protection system

The invention provides a data protection system, which is characterized by comprising a data protection storage device; and a proxy program which is provided in a host device belonging to a user terminal or a server, performs a linkage operation through a network with the data protection storage device, and performs the linkage operation when the host device requests to open a file stored in the data protection storage device. The data protection system determines whether an opening request meets an allowance condition according to a data protection rule specified in advance, and returns a fake file instead of an original of the file requested to be opened to the host device when the opening request does not meet the allowance condition. 提供一种数据保护系统，其特征在于，包括：数据保护存储装置；以及代理程序，设置在属于用户终端或者服务器的主机装置中，通过与所述数据保护存储装置的网络，执行联动操作，当所述主机装置请求打开保存在所述数据保护存储装置中的文件时，所述数据保护系统判断打开请求是否符合依据事先指定的数据保护规则的允许条件，当不符合所述允许条件时，向所述主机装置回传假文件(fake file)而不是所述请求打开的文件的原件。