key-controlled
adjectiveUK /ˈkiː kənˌtrəʊld/
US /ˈki kənˌtroʊld/
Something that is key-controlled can only be opened or started with a special key.
The key-controlled gate keeps the playground safe at night.
OTHER MEANINGS
2. Operated or regulated by pressing keys on a device.
The key-controlled toy robot moves when you press its buttons.
3. Managed or directed by a central or important person or system.
The key-controlled lighting system turns on all the lamps at once.
4. Protected so that only someone with the right key can use it.
Only the teacher can open the key-controlled cabinet.