Can be used when the OPC UA server only supports one endpoint that is set up without security options (securityMode=None, securityPolicy=None). Typical use cases include demo setups of an OPC UA server or an OPC UA server that provides public and read-only UA attributes, e.g., for monitoring purposes for a dashboard.

In that case WoT Thing Description should specify the NoSecurityScheme by the vocabulary term nosec (i.e., "scheme": "nosec").