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US 7,119,662 B1Granted
Service system, information processing system and interrogator
AssigneeHitachi, Ltd.
InventorsAkiko Horiguchi, Mitsuo Usami, Masaru Ohki
Life of this patent
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AssigneeHitachi, Ltd.
InventorsAkiko Horiguchi, Mitsuo Usami, Masaru Ohki
Estimating the term…
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.
A service system comprising:
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.
Dependencies are inferred from the claim text.