Method of checking authenticity of sheet with built-in electronic circuit chip

• US 7,007,854 B2
• Filed: 09/30/2003
• Issued: 03/07/2006
• Est. Priority Date: 12/07/1998
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd., Hitachi Research Institute (Hitachi, Ltd.)
• Original Assignee: Hitachi, Ltd., Hitachi Research Institute (Hitachi, Ltd.)
• Inventors: Usami, Mitsuo, Yagi, Hiroyuki, Tsuji, Kazutaka, Okamoto, Chikashi, Takaragi, Kazuo, Yasunobu, Chizuko, Tsunemi, Yasuhiro, Isobe, Asahiko
• Primary Examiner(s): Lee, Diane I.
• Application Number:
  US10/673,451
• Publication Number:
  US 20040060978A1
• Time in Patent Office: 889 Days
• Field of Search: 125/492, 125/375, 125/380, 125/382, 902/1, 902/2, 902/7, 705/18, 705/39, 705/44, 705/45, 705/76, 340/10.31, 340/10.1, 340/10.42, 340/5.8, 340/5.81, 340/5.86, 713/189, 713/168, 713/176
• US Class Current: 235/492
• CPC Class Codes: G06Q 20/042 characterized in that the payment protocol involves at least one cheque
• CPC Class Codes: G07D 7/003 using security elements using digital security elements G07D7/004
• CPC Class Codes: G07D 7/0047 using checkcodes, e.g. coded numbers derived from serial number and denomination
• CPC Class Codes: G07D 7/01 Testing electronic circuits therein
• CPC Class Codes: G07D 7/12 Visible light, infrared or ultraviolet radiation
• CPC Class Codes: G07D 7/2033 Matching unique patterns, i.e. patterns that are unique to each individual paper

Abstract

A method of checking sheets as to forgery thereof, the sheet being provided with an electronic circuit chip from which information can be read cut or written and having visible information. The method includes a step of encrypting the visible information of the sheet and storing the encrypted visible information in the electronic circuit chip, and a step of determining discriminatively the authenticity of the sheet by comparing the visible information of the sheet with the information stored in the electronic circuit chip.

Claims

1. A system for detecting forgery of a sheet, said system including a forgery detecting device and a memory device which are connected via a network,

said forgery detecting device including a control unit, a scanning unit and a discriminating unit,

said sheet including information obtainable by said scanning unit and an electronic circuit chip which stores a unique number,

said memory device storing unique information correlated with said unique number, said unique information being unique to said sheet, said electronic circuit chip or a combination of the sheet and the electronic circuit chip,

said control unit reading out said stored unique number from said electronic circuit chip provided in said sheet,

said control unit obtaining from said memory device said stored unique information correlated with said unique number and unique to said sheet, said electronic circuit chip or a combination of the sheet and the electronic circuit chip,

said scanning unit acquiring said information obtainable by said scanning unit, by scanning said sheet, and

said discriminating unit comparing said unique information unique to said sheet, said electronic circuit chip or a combination of the sheet and the electronic circuit chip with said information obtained by scanning said sheet to discriminatively determine whether the information acquired from said sheet is authentic.

2. A forgery detecting system according to claim 1, wherein said forgery detecting device includes a transmitter and a receiver,

said transmitter is responsive to an instruction from said control unit to supply electric power to said sheet by transmission of an electric wave,

said electronic circuit chip provided in said sheet is responsive to supply of electric power by said electric wave to transmit said unique number stored therein, and

said receiver is responsive to reception of said transmitted unique number to output the same to said control unit.

3. A forgery detecting system according to claim 1, wherein said memory device encrypts the information unique to said sheet, said electronic circuit chip or a combination of the sheet and the electronic circuit chip when taken out by said control unit,

said forgery detecting device includes a decrypting unit, and

said decrypting unit decrypts the information unique to said sheet, said electronic circuit chip or a combination of the sheet and the electronic circuit chip when taken out by said control unit and outputs the decrypted information to said control unit.

4. A forgery detecting system according to claim 1, wherein said memory device is provided in said sheet having said electronic circuit chip.

5. A forgery detecting system according to claim 1, wherein said forgery detecting device comprises an output unit, and said control unit outputs a result of said discrimination by said discriminating unit to said output unit.

6. A forgery detecting system according to claim 1, wherein said forgery detecting device comprises an image processing unit, and

said image processing unit image-processes information from said sheet by scanning the sheet, and outputs a result of the image-processing therefor to said discriminating unit.