Patent ID: 7501946

Claim:
A method of determining whether to provide a user with access to a cargo security system, comprising the steps of: entering a user password for verification by a computing device program; opening a stored license file of the computing device program and reading a first data pair including a first serial number and a first access password; attempting to find a data pair match: using the first access password of the computing device to send a first request command to an electronic control unit to verify the first serial number, if the electronic control unit confirms the first serial number matches the first access password, defining a data pair match, communication is established between the computing device and the electronic control unit; using a second data pair from the stored license file to verify a second serial number, if the electronic control unit rejects the first request, and if the electronic control unit confirms the second serial number matches a second password, a data pair match has successfully occurred and communication is established between the computing device and the electronic control unit; and continuing this process until a data pair match has successfully occurred and communication is established between the computing device and the electronic control unit; and indicating an error message if no data pair matching has occurred, whereby communication between the computing device and electronic control unit has failed.