codebox
nounUK /ˈkəʊd.bɒks/
US /ˈkoʊd.bɑːks/
A codebox is a small box where you type secret code to open something.
She typed the number into the codebox and the door opened.
OTHER MEANINGS
2. A box on a computer screen where you type code or text.
Paste your answer into the codebox and click Run.
3. A locked box used to store secret codes or important papers.
The guard kept the keys in a codebox behind the desk.
4. A small device that shows or checks a secret number.
The codebox beeped when he entered the wrong digits.