Table 2.

Security rule structure.

Device D	The device name d and manufacturer M of the device, expressed as M.d.
Domain Dom	The domain where the rule applies. For instance, Dom = LAN for rules that apply within the local network, or Dom = * for rules that apply to any domain.
Shares	List of devices that the device D can interact with, in the domain Dom . We use * to denote that anything applies. Examples: M.* specifies any device from a specific manufacturer M . Similarly, *.* (or simply *) specifies any device from any manufacturer.
Provides	List of services s${}_{\mathsf{1}}$, …, s${}_{\mathsf{n}}$, $n\ge 0$, that the IoT device D provides to the devices in Shares$\left({\mathsf{D}}_{}\right)$.
Requires	List of services s${}_{\mathsf{1}}$, …, s${}_{\mathsf{m}}$, $m\ge 0$ that the IoT device D requires to function.