Communication by a network node in a data network

A network node comprising:

• at least one transducer,
• at least one wireless interface,
• at least one processor unit, and
• at least one data memory,
• wherein program logic executable by the network node is implemented in the network node, characterized in that the executable program logic of the network node is configured and arranged to
• receive at the network node at least one message via a wireless interface from a communication partner, wherein the at least one message is a verification message, and verification data is attached to the verification message and includes a transmitter measured data image representative of measured data acquired by the communication partner in a preceding recording period in a certain time range, and
• verify, via the network node, the communication partner by a comparison, based on a correlation known to the network node and/or communicated by the communication partner to the network node, of the transmitter measured data image with a receiver measured data image created separately from the transmitter measured data image, and which is stored in the at least one data memory of the network node;
• wherein the executable program logic of the network node is further configured and arranged, after the verification of the communication partner, to create at least one virtual network node on the basis of the correlation.