| 摘要 |
PURPOSE: A method for renting and transferring a file is provided to increase the creation will of a developer, and to activate the file rent business by transferring a program which automatically deletes the file after predetermined expiration so as to prevent an illegal file distribution. CONSTITUTION: When a customer A transfers a file to other customer B, the customer configures service term or frequency. When the file sent to the customer B is expired or exceeded over the service frequency, the file is automatically deleted(105). This theory is applied to a secret document, electronic document, mp3 file service, and so on. |
