| 摘要 |
PURPOSE: To provide a security system suitable for preventing the unauthorized copy of software. CONSTITUTION: Plural LC resonance tags 1 are adhered to a CD case 23 of a CD-ROM as a check digital generating means at the time of install then the CD-ROM is sold, and the DC case 23 is loaded on a reflected wave scanner 11 connected with a personal computer 21 so that the reflected waves of the LC resonance tags can be detected. The reflected wave scanner 11 outputs check digits corresponding to the reflected waves of the LC resonance tags 1 to the personal computer 21. The installer of the personal computer 21 confirms the ID key data of the CD-ROM and the check digits, and executes install. After the install, the peeling or adhered position change of the LC resonance tags 1 of the CD case 23 is operated according to a message, and the installer confirms the change of the reflected waves, and ends the install.
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