Service system, information processing system and interrogator

• US 7,119,662 B1
• Filed: 09/21/2000
• Issued: 10/10/2006
• Est. Priority Date: 06/15/2000
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Usami, Mitsuo, Ohki, Masaru, Horiguchi, Akiko
• Primary Examiner(s): Horabik, Michael
• Assistant Examiner(s): NGUYEN, NAM V
• Application Number:
  US09/666,862
• Time in Patent Office: 2,210 Days
• Field of Search: 340/5.7, 340/5.61, 340/5.71, 340/5.72, 340/5.73, 340/5.74, 340/5.8, 340/5.6, 340/5.62, 340/5.64, 340/5.57, 340/5.85, 340/5.86, 340/5.91, 340/5.92, 340/10.1, 340/10.3, 340/10.42
• US Class Current: 340/5.7
• CPC Class Codes: B42D 2033/46 with electrical circuitry
• CPC Class Codes: B42D 25/29 Securities; Bank notes
• CPC Class Codes: B42D 25/305 Associated digital information record carriers for use with machines and with at least a part designed to carry digital markings G06K19/00
• CPC Class Codes: B42D 25/405 Marking
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card
• 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: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 2209/80 Wireless network architectures or network communication protocols for wireless network security H04W12/00
• CPC Class Codes: H04L 9/3249 using RSA or related signature schemes, e.g. Rabin scheme
• CPC Class Codes: H04L 9/3263 involving certificates, e.g. public key certificate [PKC] or attribute certificate [AC]; Public key infrastructure [PKI] arrangements network architectures or network communication protocols for supporting authentication of entities using certificates in a packet data network H04L63/0823

Abstract

A contactless IC chip is mounted or adhered on a certificate and used in a service system having an interrogator and a computer system. The interrogator and the computer system are interconnected via a network such as the Internet. The IC chip is used as an electronic tag and the interrogator receives first information by reading information printed on the certificate including a digital signature and by receiving second information from the electronic tag through an antenna of the interrogator. Then, the first information from the certificate and the digital signature are used by the computer to calculate third information that is compared with the second information received from the electronic tag. If the comparison results in a match, then the certificate is deemed authentic.

Claims

1. A service system comprising:

an interrogator; and

a computer system,

wherein the interrogator and the computer system are interconnected via at least one of a leased circuit, a public circuit and an Internet;

the interrogator reads first information and a digital signature printed on the surface of a certificate which comprises an electronic tag by a character reading part of the interrogator, receives a second information stored in the electronic tag by an antenna part of the interrogator, and sends the first information and second information and digital signature to the computer system;

the computer system calculates a third information from the first information and the digital signature using RSA public key encription and certifies the certificate by comparing the second information with the third information.

2. The service system according to claim 1;

wherein the digital signature is calculated from a linkage of the first information and the second information.

3. The service system according to claim 1;

wherein the digital signature is calculated from a sum of the first information and the second information.

4. The service system according to claim 1;

wherein the digital signature is generated from a third information to the power of a fourth information modulo a fifth information for a secret key;

the third information comprises the first information and the second information; and

the secret key comprises the fourth information and the fifth information.

5. The service system according to claim 1;

wherein the third information is the difference between the digital signature to the power of a fifth information modulo a sixth information for a public key and the first information; and

the public key comprises the fifth information and the sixth information.

6. The interrogator according to claim 1;

wherein the certificate is used as a life insurance certificate, non-life insurance certificate, a health insurance certificate, a merchandise coupon, a share certificate, a paper money, a ticket or a passenger ticket.

7. An interrogator which reads a first information and a digital signature printed on the surface of a certificate which comprises an electronic tag by a character reading part of the interrogator, receives a second information stored in the electronic tag by an antenna part of the interrogator, calculates a third information from the first information and the digital signature using RSA public key encription, and certifies the certificate by comparing the second information with the third information.

8. The interrogator according to claim 7;

wherein the digital signature is calculated from a sum of the first information and the second information using RSA.

9. The interrogator according to claim 7;

wherein the digital signature is calculated from a linkage of the first information and the second information using RSA.

10. The interrogator according to claim 7;

wherein the digital signature is generated from a third information to the power of a fourth information modulo a fifth information for a secret key;

the third information comprises the first information and the second information; and

the secret key comprises the fourth information and the fifth information.

11. The interrogator according to claim 7;

wherein the third information is the difference between the digital signature to the power of a fifth information modulo a sixth information for a public key and the first information; and

the public key comprises the fifth information and the sixth information.

12. The interrogator according to claim 7;

wherein the certificate is used as a life insurance certificate, non-life insurance certificate, a health insurance certificate, a merchandise coupon, a share certificate, a paper money, a ticket or a passenger ticket.