Title:
INFORMATION DISTRIBUTION METHOD IN MOBILE COMMUNICATION NETWORK
Document Type and Number:
Japanese Patent JP3640237
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To encrypt distributed information and to distribute the encrypted information with an encryption method with high security, where management of an encryption key is easy.
SOLUTION: An information server 5 encrypts distributed information by an encryption key and encrypts the encryption key, by using an authentication key different by every mobile station. The encrypted encryption key and the distributed information are transferred to a mobile station 1 at the same time or at different times. The mobile station 1 uses the authentication key possessed by itself to interpret the encrypted encryption key and uses the interpreted encryption key to decode the distributed information.
Inventors:
Yukichi Saito
Kyuichi Uesaka
Kan Nakamura
Motoi Tamura
Daisuke Akiyama
Kyuichi Uesaka
Kan Nakamura
Motoi Tamura
Daisuke Akiyama
Application Number:
JP16393998A
Publication Date:
April 20, 2005
Filing Date:
June 11, 1998
Export Citation:
Assignee:
NTT DoCoMo, Inc.
International Classes:
H04L9/08; H04L9/32; H04W12/02; (IPC1-7): H04Q7/38; H04L9/08; H04L9/32
Domestic Patent References:
| JP1284890A |
Foreign References:
| WO1999027678A1 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Susumu Kako
Kazuo Abe
Susumu Kako
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