Access Control Methods: Card, PIN, Biometric, Mobile Compared

A comparison of access control credential types — RFID cards, PIN codes, biometric (fingerprint, face), and mobile credentials — with guidance on when each is appropriate.

RFID cards and key fobs

The most common credential. Users carry a card (typically MIFARE DESFire or HID iCLASS for modern systems) presented to a reader. Pros: cheap, reliable, instantly revocable. Cons: cards get lost, can be shared between users, and older formats (125 kHz EM, MIFARE Classic) can be cloned with cheap equipment.

PIN keypad

User enters a numeric PIN. Pros: no physical credential needed. Cons: PINs get shared, watched (shoulder-surfing), or written down. Best used in combination with another factor (card + PIN for two-factor).

Biometric — fingerprint

User's fingerprint is matched against an enrolled template. Pros: cannot be transferred or lost. Cons: dirty/wet hands fail to read, fingerprint sensors wear over high-traffic use, some users (manual workers) have worn ridge patterns.

Biometric — face recognition

Camera captures face, matches against enrolled template. Pros: contactless, fast, hygienic. Cons: requires good lighting, masks reduce accuracy, privacy concerns and regulation in some jurisdictions.

Mobile credentials

User's smartphone (NFC or Bluetooth) acts as the credential. Pros: no card to lose, easy provisioning over-the-air, supports two-factor with phone PIN. Cons: depends on phone battery, requires user education.

Recommendations for Iraq deployments

For general office: MIFARE DESFire EV2 cards. For executive areas / data centres: card + PIN (two-factor). For high-security (server room, finance): card + biometric. For visitor management: mobile credential delivered via QR code. Hikvision and Paradox readers used by TSB Smart Tech support all four credential types on a single controller.

Frequently asked questions

Can old proximity cards be cloned?

Yes — 125 kHz EM and MIFARE Classic cards can be cloned with sub-$50 hardware. Modern installations should use MIFARE DESFire EV2 or HID iCLASS SE/Seos cards which are cryptographically protected.

Is face recognition legal in Iraq?

No specific data protection law currently restricts biometric collection in Iraq. However, EU GDPR-style consent is best practice and is increasingly expected by international clients and multinationals.

How many doors can one controller support?

A typical 4-door controller manages 4 readers. Larger systems use multiple controllers networked to a central management server, scaling to thousands of doors per site.

What happens to access control during a power outage?

The system runs on a UPS for the controller plus battery-backed door locks. Most installations include 4-8 hours of battery autonomy. After UPS depletion, fail-safe locks unlock for life-safety; fail-secure locks remain locked. The choice depends on the door function.