Electronic security describes security measures that are designed to deny access to unauthorized personnel (including attackers or even accidental intruders) from physically accessing a building, facility, resource, or stored information; and guidance on how to design structures to resist potentially hostile acts.

With electronic security, you can quickly detect potential intruders and immediately alert the emergency services. That makes this form of security an important addition to the architectural security, because what good are structural barricades if the intruders have got all the time in the world to break through them? Electronic security ensures that the burglars are detected early, so they have less time to break through the architectural barriers.