Technology & Security
How electricity, computers, and biometrics transformed access control — and what each layer of modern security actually does.
Mechanical locks guard the door. Modern buildings layer electronics on top: credentials instead of brass keys, servers instead of key rings, sensors instead of watchmen. This section explains each technology on its own terms — how it works, where it is used, and what trade-offs come with going digital.
Who may enter, when, and through which door — the logic behind modern building security.
Fingerprints, faces, and irises as credentials. Convenience, accuracy, and privacy considerations.
Magstripe, proximity, and smart cards — how badge systems authenticate at the door.
Solenoids, motors, and circuits replacing the pure mechanical bolt throw.
Wi-Fi and Bluetooth deadbolts — apps, guest codes, and the connected front door.
Proximity cards, fobs, and NFC phones replacing brass keys in hotels and offices.
Proximity fobs and push-button start — the connected vehicle access ecosystem.
Detection, notification, and response — what happens after the lock is bypassed.
Overview of complementary hardware — from Kensington locks to ultrasonic systems.
The small cable lock that became the standard for laptop physical security.
Sound waves as a sensing and access technology — niche but fascinating.
Frame-side latch keepers for access control — fail-safe vs fail-secure, and how strikes differ from maglocks.
Maglocks — holding force, fail-safe behavior, and fire-code requirements for access-controlled doors.
A mechanical lever lock with an electric mechanism that locks or unlocks the outside lever.
A switch, button, or sensor that signals someone is leaving through a controlled door.
A vehicle key with a chip that an immobilizer must recognize before the engine will start.
Hardware that holds an exit briefly, sounds an alarm, then releases, only where the code allows it.
Z-Wave, Zigbee, Thread, Matter, and the other radios residential smart locks use.