Method and system for providing security for the first time a mobile device makes contact with a device

A system for providing security for an initial contact made between a mobile device and a transportation vehicle device of a transportation vehicle, the transportation vehicle device having a symmetric key introduced by a trusted entity, wherein the system comprises:

• software stored on a non-transitory computer readable medium, which software, when run on a processor facilitates use of the symmetric key for communication between the mobile device and the transportation vehicle device;
• a control device configured to implement pairing processes for establishing a connection between the transportation vehicle device and the mobile device using the symmetric key based on the software that performs operations to facilitate use of the symmetric key for communication between the mobile device and the transportation vehicle device,
• wherein the system introduces the symmetric key into the mobile device by the trusted entity by installation of a program in the mobile device prior to initial contact between the mobile device and the transportation device, performs a key exchange procedure in response to contact being made, wherein the key exchange procedure is performed directly between the mobile device and the transportation vehicle device, the key exchange procedure resulting in a shared key in the mobile device and in the transportation vehicle device, generates a first signature with the symmetric key using the shared key in the mobile device, generates a second signature with the symmetric key using the shared key in the transportation vehicle device, transmits the first signature to the transportation vehicle device and the second signature to the mobile device so as to exchange signatures therebetween, authenticates the transportation vehicle device by cryptographic verification of the second signature with the symmetric key in the mobile device, authenticates the mobile device by cryptographic verification of the first signature with the symmetric key in the transportation vehicle device, and continues the contact-making process only in response to mutual successful authentication,
• wherein, during the key exchange procedure, generation of the first and second signatures and authentication of the transportation vehicle device and the mobile device by cryptographic verification are performed without physical access to the transportation vehicle device inside the transportation vehicle by a user associated with the mobile device.