RADIO TAG SECURITY EXTENSION METHOD, ID MANAGEMENT COMPUTER SYSTEM, PROXY SERVER DEVICE, THEIR PROGRAMS, AND RECORDING MEDIUM OF PROGRAMS

摘要

PROBLEM TO BE SOLVED: To protect privacy relating to the ID of a radio tag and to improve the security of the radio tag.

SOLUTION: An ID management computer 1 conceals a small capacity version ID indicating an original product identification electronic code (EPC), turns it to a secret ID, sets it in the individual number area of the large capacity version ID of the radio tag 20, and sets information whose transmission destination is a proxy server 4 in the area of a manufacturer code and a product kind code. A client 3 reads the large capacity version ID from the radio tag 20 and transfers the large capacity version ID to the proxy server 4. The proxy server 4 restores the original small capacity version ID by decoding the secret ID set to the received large capacity version ID and transfers the decoded original small capacity version ID to an ID processing server 5 which processes the ID from the manufacturer code and the product kind code.

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