METHOD FOR FILE UPLOAD TO CLOUD STORAGE SYSTEM, DOWNLOAD METHOD AND DEVICE

摘要

Disclosed are a method for uploading files to a cloud storage system, a downloading method and a device, wherein the method for uploading files to cloud storage system is applied to a client end, including: generating a file key; performing a security processing on an original data file according to the file key and generating a secure data file; sending the secure data file to a cloud storage system. The abovementioned technical solution provides an end-to-end confidentiality and integrity protection for data stored by a user in a cloud storage system, thus solving the problem that the data storage security in the cloud storage system is relatively poor.