Title:
POSITION INFORMATION SERVICE SYSTEM, POSITION INFORMATION USING METHOD FOR POSITION INFORMATION SERVICE SYSTEM, ORIGINATING TERMINAL, KEY UPDATE CENTER, AND INCOMING TERMINAL
Document Type and Number:
Japanese Patent JP3719090
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a position information service system which makes the ID of an originating terminal secret to the outside of an exchange network, provides information at a request from an incoming terminal unlimitedly to a special number and charges the terminal for the information, and prevents position information from being fraudulently altered and data from being unauthorizedly reused.
SOLUTION: The originating terminal has position information and a means for ciphering the position information by using a ciphering key, and ciphers the position information by using the ciphering key which is periodically updated (at contract limit time) and sends the ciphered information to a terminating terminal. The incoming terminal has a deciphering key and a means for deciphering the ciphered position information by using the deciphering key, and deciphers the ciphered position information sent from the incoming terminal by using a ciphering key distributed from a key update center when the ciphering key of the originating terminal is updated to obtain the position information.
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Inventors:
Ryuta Masuda
Shigeru Date
Kenji Yasunaga
Shinichi Mine
Shigeru Date
Kenji Yasunaga
Shinichi Mine
Application Number:
JP2000081960A
Publication Date:
November 24, 2005
Filing Date:
March 23, 2000
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
G09C1/00; H04L9/08; H04M1/57; H04M3/42; H04M11/00; H04M17/00; (IPC1-7): H04M3/42; G09C1/00; H04L9/08; H04M1/57; H04M11/00; H04M17/00
Domestic Patent References:
| JP9247758A | ||||
| JP11163850A | ||||
| JP11215114A | ||||
| JP5122217A |
Attorney, Agent or Firm:
Tadahiko Ito