Communication processing system, communication processing...

Cryptography – Key management

Reexamination Certificate

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Details

C380S264000, C380S278000, C713S153000, C713S155000, C713S162000, C726S018000

Reexamination Certificate

active

07317798

ABSTRACT:
A communication processing system which allows a secure communication with a mobile terminal via a network. The communication processing system includes a server which provides a common key used to encrypt and decrypt data transmitted between communication terminals, and provides information about locations of communication terminals on the network. The server generates a session key and provides it to communication terminals. The server has a database in which location information of mobile terminals is stored. If the server receives, from a calling terminal, data designating a destination terminal, the server searches the database using an IP address of the destination terminal as a search key to acquire the latest location information of the destination terminal, and the server transmits encrypted data including a session key and address data of the destination terminal to the calling terminal.

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