Which parts of a lock are subject to attack or compromise?

• A. The key device, the operating mechanism, the latch and bolt
• B. The hinges and strike
• C. The door frame and jamb
• D. The screws and pins only

Answer: (A)

Attack surfaces are the parts of a lock that an attacker can manipulate to defeat it. The key device, the operating mechanism, and the latch and bolt are the most exposed because they are directly involved in verifying access and securing the door. The key device is prone to methods like picking or bumping; the operating mechanism can be manipulated to release or misdrive the latch; and the latch and bolt are the components that physically engage the strike and are most vulnerable to forced entry. Hinges, strike, door frame, and jamb are important for overall door security but are not the lock’s internal components or its primary attack surface. Screws and pins matter, but they are only part of the mounting and not the primary functional elements that control entry.