Smart Lock Security Considerations: What to Know Before You Install

Smart locks have become increasingly popular, offering keyless entry, remote access, visitor codes, and integration with other smart home devices. The convenience is real. The security tradeoffs are more complex than most buyers evaluate.

What Smart Locks Add

**Convenience features:** keyless entry, remote unlock for visitors, visitor codes for workers, auto-locking, activity logs.

**Integration:** connection with security cameras, smart home systems, voice assistants.

**Access management:** different codes for family members, workers, guests. Can be revoked without rekeying.

What Smart Locks Add in Risk

**Electronic attack surface.** Traditional locks are picked with physical skill. Smart locks can be attacked electronically via WiFi, Bluetooth, or physical electronics vulnerabilities.

**Software dependency.** Smart locks run software with bugs. Firmware vulnerabilities can create unlock mechanisms attackers can exploit.

**Internet dependency for many features.** Remote access requires cloud connectivity. Service outages, account compromise, or company failures affect lock operation.

**Battery dependency.** Dead batteries can lock you out or lock out legitimate users. Most smart locks have backup physical key or external battery contact.

**Data collection.** Smart lock activity (when doors open, who comes and goes) is sensitive information collected by lock manufacturer.

**Account security importance.** Compromise of your smart lock account can mean compromise of physical home access.

The Honest Comparison

Traditional locks and smart locks have different threat profiles:

**Traditional lock risks:**

- Lock picking (requires skill)

- Bump keys (requires some skill)

- Key duplication from lost keys

- Physical lock breaking (loud and visible)

**Smart lock risks:**

- All traditional risks (most smart locks still have physical key backup)

- Electronic attack via lock vulnerabilities

- Account compromise leading to remote unlock

- Firmware bugs enabling unauthorized access

- WiFi/Bluetooth attacks (depending on connection method)

- Battery failures

Neither is clearly more secure overall. Smart locks shift the risk profile but do not eliminate traditional risks (physical attack still works) while adding new electronic risks.

Smart Lock Categories

**WiFi-connected smart locks.** Cloud-connected for remote access. Most convenient but largest attack surface. Examples: August, Yale Assure, Schlage Encode.

**Bluetooth-only smart locks.** No internet connection, limited to proximity-based access. Smaller attack surface but no remote features. Examples: August Smart Lock Pro (Bluetooth mode), Kwikset Convert.

**Z-Wave or Zigbee smart locks.** Local wireless protocols requiring hub. Can be internet-isolated. Examples: Yale Assure (Z-Wave versions), Schlage Connect.

**Keypad-only locks.** Electronic but no wireless. Code entry replaces physical key. Simpler attack surface. Examples: Schlage Encode without WiFi, August Smart Keypad.

For most users, the practical choice depends on specific features wanted. Remote access requires WiFi connection, which is also the largest attack surface.

Specific Smart Lock Products

**August Smart Lock Pro.** Popular, generally well-reviewed. Works with existing deadbolt (replaces internal mechanism, keeps external). Can operate in Bluetooth-only mode for better security.

**Yale Assure.** Multiple models with Z-Wave, WiFi, or keypad-only options. Good physical lock construction.

**Schlage Encode.** Built-in WiFi, no hub required. Full keypad plus smartphone app. Strong physical lock mechanism.

**Kwikset Halo.** WiFi-connected with reasonable features. Mid-range option.

**Level Lock.** Invisible smart lock that fits inside existing deadbolt without external changes. Premium pricing. Best for users who want smart features without visible changes.

**Avoid:** very cheap smart locks from unknown brands. Security engineering is often weak and firmware updates may not be forthcoming.

Specific Attack Scenarios

**Account credential compromise.** Attacker gains access to your smart lock account via credential stuffing, phishing, or similar. Can unlock door remotely. Defense: strong unique password, 2FA, hardware security key for lock account.

**Lock firmware vulnerabilities.** Previously-undiscovered vulnerabilities in lock software. Historical examples: several brands have had vulnerabilities discovered that allowed various unauthorized access methods. Defense: buy from reputable brands with security update commitments.

**Physical electronic attack.** Attackers using tools to interfere with lock electronics. Various techniques have been demonstrated on various locks. Defense: physical lock still provides baseline protection; smart lock vulnerabilities often require physical proximity.

**Guest code sharing.** Workers given temporary codes share them with others. Codes used after they should have expired. Defense: unique codes per worker/service, prompt deletion of codes after use, review access logs.

**Network attack.** Smart lock WiFi credentials captured on compromised network. Defense: lock on separate IoT network segment, strong WiFi security.

Installation and Setup Practices

**Strong account password with 2FA.** Smart lock account deserves same security as banking.

**Separate network segment for smart lock.** On IoT network if you have one.

**Firmware auto-update enabled.** Ensures security patches applied.

**Guest codes with expiration dates.** Not permanent codes shared casually.

**Activity log review.** Monthly review of who accessed when.

**Backup access method.** Physical key, backup battery contact, or shared trusted person. Have plan for lock failure.

**Deletion of old codes.** When workers change, housekeepers leave, family relationships change — delete their codes.

The Legal Considerations

Smart locks raise some legal questions:

**Insurance.** Verify your home insurance covers smart lock installations. Some policies have specific provisions.

**Rental properties.** Landlord permission typically required for smart lock installation.

**Short-term rental hosts.** Smart locks are common for Airbnb/VRBO but local regulations vary.

**Record retention.** Smart lock logs can be subpoenaed in legal proceedings. Awareness of data retention and sharing policies.

The Realistic Framework

Smart locks offer real convenience benefits with manageable security risks when properly configured. For most households:

**Reasonable choice:** mid-range smart lock from reputable brand (August, Yale, Schlage, Level). Proper account security. Separate network segment. Regular firmware updates.

**Avoid:** very cheap smart locks from unknown brands. Casual sharing of permanent access codes.

**Consider upgrading from:** completely digital locks with no physical key backup (adds dependency on electronics). Legacy smart locks without current security updates (abandoned products).

**Stay traditional if:** you have specific security concerns, do not value the convenience features, or prefer predictable mechanical operation over electronic complexity.

Smart locks are mature technology in 2026. The specific product choice matters more than the general smart-vs-traditional decision. A properly configured smart lock from a reputable brand provides reasonable security plus genuine convenience. A poorly configured cheap smart lock creates more problems than it solves. Match the choice to your specific needs and security practices.