Abstract: The invention provides a communication device for emulating a behavior of a navigation device in response to executing a device firmware program installed on the navigation device. The communication device comprises a provider for providing information relating to the device firmware program, a determiner for determining whether a current firmware program installed on the communication device corresponds to the device firmware program installed on the navigation device and a processor for executing the current firmware program on the communication device in order to emulate the behavior of the navigation device if the current firmware program corresponds to the device firmware.

Abstract: The invention provides a processing device for detecting a certain computer command in a string of characters representing a uniform resource identifier, the certain command comprising a predefined command header, the command header being followed by a command name from a plurality of predefined command names. The processing device comprises a determiner for determining whether the string of characters comprises the predefined command header, the determiner being further configured to determine whether a sub-string of characters following the command header comprises the command name if the string of characters comprises the predefined command header and a provider for providing the predefined command header and the command name if the command header comprises a command name as the certain computer command.

Abstract: The invention provides a method for providing a cryptographically signed command, the command comprising a command name and at least one command argument with generating a cryptographic signature of the command name and composing the cryptographically signed command using the command name, the signature and the at least one command argument.

Abstract: The invention provides a communication device with a programmably arranged first means, a programmably arranged second means and a programmably arranged third means. The programmably arranged first means requests the programmably arranged second means to transmit the certain command to a non-existing network address, wherein the programmably arranged second means informs the programmably arranged third means about the request to transmit the certain command. The programmably arranged third means executes the certain command in response to the information indicating the request.

Abstract: The invention provides a communication device for updating current navigation contents stored in a navigation device. The communication device comprises a retrieving element for retrieving information indicating current navigation contents from the navigation device, a transmitter for transmitting the information indicating the current navigation contents to a remote network device via a communication network, a receiver for receiving updated navigation contents from the remote communication device and a processor for displaying information relating to the updated navigation contents or for installing the updated navigation contents on the navigation device.