IoT-Connected Locks: Benefits, Risks, and Best Practices

Internet-connected locks offer powerful features — but connecting any device to the internet introduces security considerations that don't exist with traditional locks.

2023-02-28 · 7 min read · Smart Locks

IoT-connected locks — smart locks that communicate over Wi-Fi, Z-Wave, or Zigbee protocols — represent a significant step up in capability from traditional locks. The ability to grant and revoke access remotely, receive real-time notifications, and integrate with broader smart home ecosystems is genuinely valuable.

But connecting any device to the internet introduces attack surfaces that don't exist with a purely mechanical lock. Understanding these trade-offs helps you make smarter purchasing and configuration decisions.

The Benefits of Connected Locks

Remote Access Management — Grant or revoke access from anywhere in the world. Let in a service technician, check whether you left the door unlocked, or lock up after a guest leaves — all from your phone.

Access Logs — Know exactly when the door was locked and unlocked, and by which credential or person. This is particularly valuable for rental properties, vacation homes, and commercial spaces.

Temporary Access Codes — Generate codes that work only during specific time windows. A cleaning service gets a code that works Tuesdays 10am–2pm. A contractor gets access only for the duration of their job.

Smart Home Integration — Trigger automations based on door status: turn off the AC when you lock up, turn on lights when you arrive, or receive an alert if a specific door hasn't been locked by a certain time.

The Risks

Network Vulnerability — Any device on your Wi-Fi network is potentially reachable by attackers who compromise that network. This is mitigated by using a secure Wi-Fi password, keeping firmware updated, and using network segmentation (a guest network for IoT devices) where possible.

Manufacturer Dependency — Connected locks depend on the manufacturer's cloud infrastructure. If the manufacturer discontinues a product line or their servers go offline, remote features may stop working. This has happened with several smart home products — research the company's history and reputation before investing.

Physical Override Still Matters — Most smart locks still have a physical keyway as a backup. The physical security of that keyway — pick resistance, key control — remains important even if you primarily use the app.

Battery Failure Means No Access — Unlike a traditional lock where a dead battery is just an inconvenience (you use the physical key), a smart lock with a dead battery and no physical backup can lock you out with no way to enter until you replace the batteries. Most good products have a physical terminal that accepts an external battery or a 9V connection for emergency power.

Best Practices

• Keep your lock's firmware updated; manufacturers regularly patch security vulnerabilities
• Use a dedicated IoT Wi-Fi network, separate from your main home network
• Enable all available security features in the app (two-factor authentication, activity notifications)
• Choose locks from established brands with transparent security update policies
• Have a physical key backup, stored securely offsite, for emergency use

Caraballo Locksmith installs and configures connected locks for Miami homes and businesses. We can advise on product selection, network security basics, and proper installation for optimal performance.