Access Control Systems for Commercial Buildings: Card, Fob, or Mobile?
Modern access control goes far beyond keys and locks. Here's how to choose the right credential type for your building.
Proximity Cards (125kHz)
- Lowest cost per credential ($1-3 per card) - Easy to clone — NOT recommended for high-security areas - Good for: Low-security doors, parking garages, gym access
Smart Cards (13.56MHz — MIFARE, DESFire, iCLASS SE)
- Encrypted communication prevents cloning - Can store multiple credentials (access + print + vending) - $3-8 per card, readers $200-400 each - Good for: Office buildings, hospitals, government facilities
Mobile Credentials (Bluetooth/NFC)
- Smartphone replaces physical card - Revocable remotely in seconds - No physical credential to lose or duplicate - $2-5/user/year for software licensing - Good for: Tech companies, coworking spaces, multi-tenant buildings
Biometric (Fingerprint, Facial Recognition)
- Highest security — credential can't be shared or lost - Higher cost per reader ($500-2,000) - Privacy considerations in some jurisdictions - Good for: Server rooms, executive areas, research labs
Integration Points:
- IP camera system — Trigger recording on access events - Visitor management — Issue temporary credentials with auto-expiration - Elevator control — Restrict floor access by credential level - HR systems — Auto-provision/deprovision on hire/termination
Our recommendation:
Smart cards (DESFire EV3) provide the best balance of security and cost for most commercial buildings. Add mobile credentials as a convenience layer. Reserve biometrics for your most sensitive areas.
Summit DNC designs and installs access control systems integrated with IP cameras and network infrastructure across Southern California.
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