| 摘要 |
PROBLEM TO BE SOLVED: To store a content of a terminal device in a cloud environment.SOLUTION: Storage servers 13a-13d, a front server 200, and terminal devices 100a-100d are connected to a network 11. The terminal device operates the front server to store a created content. The front server acquires an account of each storage server. The front server divides the received content into sub-files to be stored on different storage servers. The terminal device issues a request for downloading the content stored in the front server. The front server acquires the sub-files from the storage serves to restore the content, and transmits it to the terminal device. The front server stores meta information for decrypting the content from the sub-files, encrypted with a public key of the terminal device.SELECTED DRAWING: Figure 1 |
