POSITION INFORMATION SERVICE SYSTEM, POSITION INFORMATION USING METHOD OF POSITION INFORMATION SERVICE SYSTEM, ORIGINATING TERMINAL, AND DECODER MODEL - Nippon Telegraph and Telephone Corporation

Title:

POSITION INFORMATION SERVICE SYSTEM, POSITION INFORMATION USING METHOD OF POSITION INFORMATION SERVICE SYSTEM, ORIGINATING TERMINAL, AND DECODER MODEL

Document Type and Number:

Japanese Patent JP3684989

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 for a terminating terminal unlimited to a special number and charges the terminal, and prevent position information from being altered and data from illegally being reused.
SOLUTION: The originating terminal stores position information, ciphers the position information by using a ciphering key which is periodically updated, and sends the information to a decoder module attached to a terminating terminal. The decoder module deciphers the ciphered position information by using a deciphering key which is automatically updated when the ciphering key of the originating terminal is updated and provides the information for the terminating terminal. The originating terminal generates a key including the terminating terminal telephone number and ciphers the position information and the decoder module generates a key including the telephone number of the connected terminating terminal, so that only the limited terminal obtains the position information deciphered by the decoder module.

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Inventors:

Ryuta Masuda
Shigeru Date
Kenji Yasunaga
Shinichi Mine

Application Number:

JP2000081961A

Publication Date:

August 17, 2005

Filing Date:

March 23, 2000

Export Citation:

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Assignee:

Nippon Telegraph and Telephone Corporation

International Classes:

H04L9/08; H04L9/14; H04M3/42; H04M3/487; H04M11/00; (IPC1-7): H04M3/42; H04L9/08; H04L9/14; H04M3/487; H04M11/00

Domestic Patent References:

JP9018588A
JP3203432A
JP4037342A

Attorney, Agent or Firm:

Tadahiko Ito

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