Mojo C-75 - Appendix A: Sensor-Server Mutual Authentication; Authentication Process

C-75 Installation Guide
28
Appendix A: Sensor-Server Mutual Authentication
The Sensor-server communication begins with a mutual authentication step in which the sensor and server
authenticate each other using a shared secret. The sensor-server communication takes place only if this
authentication succeeds.
After the authentication succeeds, a session key is generated. All communication between the sensor and
server from this point on is encrypted using the session key.
The sensor and server are shipped with the same default value of the shared secret. The CLI commands are
provided on both server and sensor for changing the shared secret.
Note : Although the server is backward compatible, that is, older version sensors can connect to a newer
version server, this is not recommended.
Note : After the shared secret (communication key) is changed on the server, all sensors connected to the
server will automatically be set up to use the new communication key. Sensors that are not connected to the
server at this time must be manually set up with the same communication key to enable communication with
this server.