Method for interaction between IOT nodes in a local network and local IOT node network

A method for interaction between Internet-of-Things (IoT) nodes in a local network,

• wherein the local network is formed by an Ethernet network or a single pair Ethernet network and includes a plurality of IoT nodes, and wherein each IoT node includes at least one sensor or actuator and a first interface for communication with other IoT nodes of the plurality of IoT nodes in the local network, and
• wherein the method comprises:
• forming a group of IoT nodes from the plurality of IoT nodes which together run an application,
• wherein at least one of the IoT nodes of the group has a processing unit configured to execute at least part of an application logic of the application;
• determining a group-head IoT node from the IoT nodes of the group,
• wherein the group-head IoT node is configured to provide necessary information for secure multicast communication of the IoT nodes in the group with each other, wherein the secure multicast communication in the group takes place via a User Datagram Protocol Internet Protocol (UDP/IP);
• and
• executing the application logic for implementing at least part of the application using the processing unit of the at least one of the IoT nodes,
• wherein at least all the IoT nodes of the group belong to a common public key infrastructure, which issues, distributes and verifies digital certificates that are used to secure the communication between the IoT nodes of the group,
• wherein in a self-organization phase, the group-head IoT node is determined via self-organization mechanisms using distributed service discovery procedures and secure one-to-one communication, based on a Transport Control Protocol (TCP) and a mutual Transport Layer Security Protocol (mtLS),
• wherein the IoT nodes are configured to sign a message to be sent, and
• wherein receiving IoT nodes are configured to check an origin of the message based on a signature included therein.