How do keys open locks?

A computer security expert explains how keys work – and how they are like passwords.

4 Ways to Break a Lock - wikiHow

What Is a Skeleton Key?, Antique Skeleton Keys

How lock and key combination works

Binghamton University News - SciTechDaily

Computer security – News, Research and Analysis – The Conversation – page 1

Keep your luggage locked and safe during your travels with this travel set. 2 padlocks and 4 key will allow you to secure multiple items. This

2pk Key Luggage Lock Gray - Open Story™

Riddle: What has many keys but can't open a single lock?

5 Ways to Lock a Door - wikiHow

Security – News, Research and Analysis – The Conversation – page 4