Data communication authentication system and method

A network arrangement comprising a data communication authentication system and a gateway unit, wherein:

• the data communication authentication system includes a first wireless communication network node including a locator node, the locator node including an identifier and being arranged to provide the identifier on demand for inclusion in a data communication to be transmitted from the data communication authentication system, the data communication
• authentication system being connectable to a wired public network for connecting the first wireless communication network node to the wired public network;
• the gateway unit including a second wireless communication network node arranged to communicate with the first wireless communication network node and including an identifier request component arranged to trigger the inclusion of the identifier in a communication to the wired public network from the gateway unit, the identifier being in addition to existing content of the communication;
• and
• wherein the first and second wireless communication nodes comprise a Zigbee or a 6LoWPAN node.

A data communication authentication method comprising:

• obtaining identifiers from each of one or more locator nodes installed at a location, each of the one or more locator nodes including an identifier and a communication system and being arranged to provide said identifier via said communication system, wherein the communication system further includes a wireless communication node, the wireless communication node including the locator node comprising either a Zigbee or a 6LoWPAN node;
• generating, at the location, an authentication code for the location in dependence on identifiers obtained from the one or more locator nodes;
• and,
• providing said authentication code on demand for inclusion in a data communication originating locally to said location, the authentication code being in addition to existing content of the data communication.