lockexaminer

2. A tool or device used to test whether a lock opens and closes properly.

The repairman used a lockexaminer to check the old padlock.

3. A software program that scans digital locks or passwords for weaknesses.

The security team ran a lockexaminer on the new app.

4. A person whose job is to inspect locks for safety in buildings.

The building hired a lockexaminer before the fire inspection.

5. Someone who studies the history and design of locks.

As a lockexaminer, she could tell the age of any keyhole.