A vehicle processing device authenticates that an authorized user has requested an action by the vehicle, and generates an authentication acknowledgement message. At least two security devices being present within the cabin of, or close to, the vehicle during a predetermined period following an authentication trigger event that occurs while the user performs a predetermined sequence of authentication activities (i.e., button presses, operating the vehicle or a part of it, etc.) provides a basis for the authentication acknowledgement message. Typically, information unique to each security device has been associated with the vehicle at a service provider's server. The authentication acknowledgement may include an activation code that results from processing the information, unique to each security device, received from the security devices and other random information, such as date. A service provider's server, or a user device, provides services to, or can access, respectively, the vehicle upon receiving the authentication acknowledgement.