File transmission protection method and device

The invention provides a file transmission protection method and device. The method is used for a server side and comprises the following steps: receiving a target file; performing packaging processing on the target file to generate a plurality of target file fragments; scrambling the target file fragments, generating scrambled file fragments corresponding to the target file fragments, and generating descrambling information corresponding to the scrambled file fragments; and respectively sending the scrambled file fragments and the descrambling information to a client. According to the file transmission protection method and device provided by the invention, the security of file transmission can be improved, and the leakage of file contents can be effectively avoided. 本申请提供一种文件传输保护方法及装置。其中，所述方法用于服务器端，包括：接收目标文件；将所述目标文件进行封装处理，生成多个目标文件分片；将所述目标文件分片进行加扰处理，生成每个所述目标文件分片相对应的加扰文件分片，并生成每个所述加扰文件分片相对应的解扰信息；将所述加扰文件分片和所述解扰信息分别发送至客户端。本申请提供的文件传输保护方法及装置可以提高文件传输的安全性，有效避免文件内容的泄露。