Title:
PREPAID CARD SYSTEM, CERTIFICATION SYSTEM, READER, MANAGEMENT DEVICE, AND DEVICE CERTIFICATION METHOD
Document Type and Number:
Japanese Patent JP3495232
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a prepaid card system which can simultaneously transmit certification data to the device to be certified from a certification device, certifies them at a high speed, combines the ciphering of entire certification data and the ciphering of a part of data and discriminates the cause of the certification error of the device of the certification object.
SOLUTION: A relay device 3 designates a global address and simultaneously transmits all certification data to all readers 1. The respective readers 1 receiving certification data cipher a part of certification data with an individual password key, cipher the entire certification data with a common password and return them to the relay device 3. The relay device 3 decodes certification data returned from the readers 1 for certifying them commonly in the system and compares it with certification data. The relay device 3 compares a part of data certified by the readers 1 with the individual password in certification data returned from the readers 1 in certification data returned form the readers 1, with the password with a block which is the object of password data for certification for individually certifying the devices.
Inventors:
Toshio Kuroi
Takayuki Kamata
Takayuki Kamata
Application Number:
JP26248997A
Publication Date:
February 09, 2004
Filing Date:
September 26, 1997
Export Citation:
Assignee:
NTT DATA Corporation
International Classes:
G07F7/08; G06K17/00; G09C1/00; (IPC1-7): G07F7/08; G06K17/00
Domestic Patent References:
| JP375983A | ||||
| JP759154A | ||||
| JP494232A |
Attorney, Agent or Firm:
Mitsuru Kimura