The concept of locks and keys is indeed an old one, with locks and keys used to secure doors against unwanted intruders or sealing boxes or crates with valuable or sensitive items inside. Today, locks and keys are more complex and effective than ever before, and they can be found anywhere. A person may attach a combination lock to their gym locker door, or a person can use a key-based padlock on a chest with family heirlooms inside. Many other locks are built into items such as doors, as well as safes and car doors. Some of these locks require a key, while others require a combination entered either into an electronic keypad or a manual dial. Many ordinary Americans buy locks to protect themselves or their valuables, and this is often taken for granted.

Once in a while, a lock may turn on its owner; that is, someone might accidentally lock themselves out of their car or house. Or, they may forget the combination to open a safe in their house, or the combination to their lock on a Read More