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

An information distribution system including a communication terminal, an on-board terminal configured to connect to the communication terminal by wire or wireless, and a server, wherein:

• the on-board terminal is provided with:
• an on-board terminal identification information datastore configured to store terminal identification information inherent to the on-board terminal,
• an authentication information generator configured to generate the on-board terminal authentication information including the terminal identification information stored in the on-board terminal identification datastore, and
• an inter-terminal equipment communicator configured to transmit the authentication information generated by the authentication information generator to the communication terminal,
• the communication terminal is provided with:
• an inter-equipment communicator configured to connect to the on-board terminal by wire or wireless,
• a communication terminal datastore configured to store the on-board terminal authentication information received by the inter-equipment communication section, and
• a server communicator configured to transmit the on-board terminal authentication information stored in the communication terminal datastore to the server,
• the server is provided with:
• a terminal communicator configured to receive the on-board terminal authentication information from the communication terminal,
• an authentication information verifier configured to authenticate the on-board terminal authentication information received by the terminal communication section,
• a last authentication timestamp datastore configured to store a timestamp when authentication is successfully verified by the authentication information verifier, and
• an authentication information manager configured to store the timestamp, when the authentication is successfully verified by the authentication information verifier, into the last authentication timestamp datastore, and
• wherein the server, when it receives the on-board terminal authentication information from the communication terminal, is configured to authenticate the on-board terminal authentication information using a timestamp when the on-board terminal authentication information is authenticated by the authentication information verifier, and a timestamp stored in the last authentication timestamp datastore, and
• wherein the authentication information verifier is further configured to manage an expiration date of the on-board terminal software using a last authentication timestamp inherent to the on-board terminal software stored in the software management database.