Information providing apparatus and method, information...

Details Information providing apparatus and method, information... Information providing apparatus and method, information...

2007-05-08

2007-05-08

Song, Hosuk (Department: 2135)

Cryptography

Key management

C713S189000, C713S192000

Reexamination Certificate

active

11227486

ABSTRACT:
The present invention is intended to quickly download contents while preventing unauthorized contents usage. PD authentication program authenticates telephone-integrated terminal device. Server authentication program authenticate key server. Server LCM controls the reception of a request for data for identifying key server and a key from telephone-integrated terminal device. On the basis of the data for identifying key server, server LCM sends a request for the key to key server and receives the requested key from key server. Key distribution program sends the key to telephone-integrated terminal device.

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Menezes et al.,Handbook of Applied Cryptography, XP-002301330, 1997, (5 pgs.).

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