A 64‑bit access controller is a mid‑range core processing hardware for a complete access control system. It adopts industry‑standard 64‑bit encryption for data transmission between credential readers and mainboard, mitigating basic risks of card‑data interception and sniffing. As the local decision‑making unit, it stores user permission profiles, processes verification signals, sends relay trigger commands for electric locks or pedestrian turnstile gates, and saves access‑event logs locally. Sintronic 64‑bit access controllers have been deployed for overseas access‑control projects including Nigeria and Saudi Arabia medium‑size enterprise reference projects.

Core Working Principle of 64‑bit Access Controller

Sintronic 64‑bit access controller follows standardized mid‑size access workflow: Credential Reading → 64‑bit Decryption & Verification → Permission Rule Check → Unlock / Reject Output → Event Log Recording. Full‑cycle operation steps are as follows.

1. Pre‑configuration via management software

System administrators configure parameters through Sintronic ACS‑‑SW access‑control software over TCP/IP LAN: import user card and biometric data, define time schedules, holiday rules, anti‑pass‑back and alarm settings. Permission datasets are encrypted with 64‑bit algorithm and downloaded and saved locally to controller flash memory. The hardware supports fully‑functional offline operation if PC‑server or network connection is lost.

2. Credential reading and encrypted data transmission

Users present valid credentials: RFID IC card, fingerprint, QR‑code or facial recognition to connected readers. The reader packages credential information with 64‑bit encryption and transmits data to access controller via Wiegand or RS485 bus. This encryption layer prevents basic man‑in‑the‑middle attacks and unauthorized data capture on transmission wiring.

3. Decryption and permission validation

The access controller decrypts incoming data using built‑in 64‑bit algorithm. It matches credential ID against locally‑saved user database, and checks corresponding access authority including time zone, door permission and special logic such as anti‑pass‑back.

4. Execution of access instruction‑ Access granted: Controller activates relay output, sends trigger signal to release electric door lock or trigger turnstile gate opening. Local LED and buzzer give access‑allowed prompt. ‑ Access denied: No unlock signal will be generated, local prompt indicates invalid credential.

5. Event log recording & optional network synchronization

Every access activity including successful entries, denied attempts and alarm triggers is saved into local memory. When LAN network is available, event logs upload synchronously to ACS‑SW software for audit reporting. If network goes offline, logs are cached locally and auto‑upload once network connection restores.

6. Alarm‑trigger processing

Door‑contact sensor monitors door physical state. In case of door‑overtime open or forced‑intrusion, the controller generates alarm events which can be uploaded to management PC or trigger external alarm devices.