Method for the determination of soundness of a sheet-shaped medium, and method for the verification of data of a sheet-shaped medium

• US 7,159,241 B1
• Filed: 09/21/2000
• Issued: 01/02/2007
• 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): Wright; Norman M.
• Application Number:
  US09/666,861
• Time in Patent Office: 2,294 Days
• Field of Search: 380/270, 380/271, 380/272, 713/200, 713/201, 726/10, 726/9, 726/8, 726/22, 726/26, 726/30
• US Class Current: 726/10
• CPC Class Codes: H04L 2209/60 Digital content management, e.g. content distribution
• CPC Class Codes: H04L 2209/80 Wireless
• 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

The present invention provides a service system using a certificate which is easily portable and difficult to counterfeit. The feature of the invention is to use a contactless IC chip as a portable certificate. An IC chip-attached seal is thin and small, and therefore is easily portable and distributable to a user. By integrating or attaching (or sticking) the IC chip into or on a certificate 3910, the counterfeiting of the certificate 3910 becomes difficult.

Claims

1. A method for certifying a certificate comprising:

receiving a first information stored in an electronic tag with an antenna part of an interrogator;

reading a second information and a digital signature printed on the surface of the certificate which comprises the electronic tag with a character reading part of the interrogator;

calculating a third information from the first information and the digital signature using RSA; and

certifying the certificate by comparing the second information with the third information.

2. The method according to claim 1, wherein the certificate comprises one member selected from the group consisting of a paper, a plastic and a film with an adhesive having a peel-off backing.

3. The method according to claim 1, wherein the certificate is used as a life insurance certificate, a non-life insurance certificate, a health insurance certificate, a merchandise coupon, a share certificate, a paper money, a ticket or a passenger ticket.

4. The method according to claim 1:

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

9. The method according to claim 1:

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

the fourth information comprises the first information and the second information; and

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

10. The method 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 (e) and the sixth (n) information.

5. The method according to clam 1:

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

6. The method according to claim 5:

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

7. The method according to claim 5:

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

the fourth information comprises the first information and the second information; and

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

8. The method according to claim 5:

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.

11. A method for certifying a certificate comprising:

receiving a first information stored in an electronic tag with an antenna part of an interrogator;

reading a second information and a digital signature printed on the surface of the certificate which comprises the electronic tag with a character reading part of the interrogator;

sending the first information and the second information and the digital signature to a computer system which stores a public key;

receiving a result of the certification of the certificate from the computer system which calculates a third information from the first information and the digital signature using RSA and certifies the certificate by comparing the second information with the third information.

12. The method according to claim 11, wherein the certificate comprises one member selected from the group consisting of a paper, a plastic and a film with an adhesive having a peel-off backing.

13. The method according to claim 11, wherein the certificate is used as a life insurance certificate, a non-life insurance certificate, a health insurance certificate, a merchandise coupon, share certificate, a paper money, a ticket or a passenger ticket.

14. The method according to claim 11:

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