| 摘要 |
PURPOSE:To prevent software from being illegally copied by providing each chip with individual information, i.e. a cipher translating key. CONSTITUTION:Each chip is provided with individual cipher translating information and a software developer supplies software corresponding to the chip. Thereby, a user can executes the software and backup copy on the self-system, but can not execute the software in another apparatus. In case of exposure based upon a steeper, many reticles can be set up on one device and superposition in each exposure shot can be executed, so that individual information can be efficiently written in each chip. Thus, the software can be prevented from being illegally copied. |
