公开(公告)号：JP2000205892A

公开(公告)日：2000-07-28

申请号：JP2000000897

申请日：2000-01-06

Applicant: IBM

Inventor： TIMOTHY J CHEINAA ,  GREENGARD CLAUDE A ,  WILLIAM R PUURIIBURANKU ,  CHARLES P TORESE ,  CHAI W WOO

IPC: G01D1/00 ,  G06F21/06 ,  G06K19/00 ,  G06K19/07 ,  G06K19/073 ,  G06K19/10 ,  G06Q10/00 ,  G06Q50/00 ,  G07F9/02 ,  G07G1/00 ,  G06F17/60

Abstract: PROBLEM TO BE SOLVED: To provide accurate information of a product to resist an effort for concealing a symptom such as tampering (illegal tearing) or the like, by sensing data regarding a state of an environment of an object (product) by a sensor, encoding a signal from the sensor and recording the signal. SOLUTION: A smart card 101 mounted on a product is energized by a small power source such as a battery 102 or the like. In addition to constituents such as a memory 103, a processing unit 104, an encoding module 107 and the like, a sensor 105 for detecting a change of the product or an environment caused by tampering is provided. In the module 107, an encryptional algorithm such as, for example, Menezes, Oorschot or the like is used. The overall card 101 can be protected by a tamper-proof package 109. Recording data is encoded to provide a history of a physical event of the product. A person having a key can take out data by anyone, and can decide the state of the product.