Information distribution system, and server, on-board terminal and communication terminal used therefor

摘要

Inherent terminal identification information and a terminal unique key are stored in an on-board terminal (10), and server-side terminal identification information and a server-side terminal unique key, which are same information as the above terminal identification information and terminal unique key are stored in a server (30). And, the on-board terminal (10) transmits the terminal identification information to the server (30) via a communication terminal (20), and the server (30) performs terminal authentication according to the server-side terminal identification information, and if the authentication is success, transmits encrypted software for the on-board terminal (10) of which authentication was success to the communication terminal (20). The communication terminal (20) transmits the encrypted software to the on-board terminal (10), and the on-board terminal (10) obtains a software unique key, which is encrypted by the server-side terminal unique key by the server (30), via the communication terminal (20), decrypts the encrypted software using the software unique key, and installs it.