At the heart of a door access control system is a database that stores information about authorized users, their access privileges, and the physical locations they are permitted to enter. When a user attempts to access a secured area, they present a credential, such as a card, key fob, or biometric identifier.
The system then verifies the credential against the database and, if authorized, grants access. If the user role does not require access, it is denied. This system functions through a network of hardware and software, including:
- Card Readers: These devices read information stored on magnetic stripe cards, smart cards, or proximity cards.
- Keypads: Users enter a PIN code to gain access.
- Biometric Scanners: These devices analyze unique physical characteristics like fingerprints, facial features, or iris patterns.
- Proximity Readers: These readers detect radio frequency signals emitted by proximity cards or key fobs.
The software component manages user credentials, access permissions, and system settings. It generates detailed audit trails that record access events, times, and user identities. These logs are invaluable for compliance audits, security investigations, and incident response.