Smart, Internet-connected door locks might seem new to our awareness, but there have always been more sophisticated door locks that go beyond the typical knob and key combination. Hotels, for example, make use of key cards, while some businesses have a variety of options that include biometrics. Residential houses, on the other hand, often make use of locks where you input a sequence of numbers on a keypad, practically their PIN for unlocking the gate or the door. This seemingly easy yet...

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