Door security refers to the measures taken to protect entry points in a building from unauthorized access. This can include physical barriers like deadbolts, security doors, and door frames, as well as electronic systems such as keypad locks and smart locks. These features help deter intruders and enhance the safety of occupants. In addition to locks, door security can involve the use of security cameras and motion sensors to monitor activity around entrances. Regular maintenance and upgrades to these systems are essential for ensuring their effectiveness and adapting to new security challenges.