| Yale Assure Lock SL (YRD256)
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Security Grade
Calculator v1
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Yale Assure Lock SL (YRD256)
Category: Smart Lock • Model / Gen: Assure Lock SL YRD256
Release Date: 2018-01-01 • Status: In sale
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Security Evaluation
1. Device Security
| Criterion
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Value
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Proof
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Comment
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| Known hardware tampering
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Rare
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—
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Designed with physical tamper alarms and anti-pick cylinders.
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| Known vulnerabilities
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Rare
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🔗 Proof
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Very few direct critical network CVEs; security heavily relies on the connected smart home hub.
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| Prior attacks
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Rare
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No widespread botnet attacks; attacks usually require physical proximity or hub compromise.
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| Updatability
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Very common
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🔗 Proof
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Firmware updates are delivered via the connected Z-Wave hub or Yale Access App.
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| Category Score
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Score: 2 / 3
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2. System Security
| Criterion
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Value
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Proof
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Comment
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| Authentication with other systems
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Full
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🔗 Proof
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Requires strict pairing and authentication with Z-Wave hubs or mobile devices.
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| Communications
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Encrypted with up-to-date encryption
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Uses Z-Wave S2 security framework or encrypted Bluetooth (BLE).
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| Storage
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No encryption
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Only stores local lock states and PIN codes internally; not a bulk data storage device.
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| Category Score
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Score: 2 / 3
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3. User Authentication
| Criterion
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Value
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Proof
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Comment
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| Account management
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Full
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User PINs and app access are managed through the Yale Access app and master account.
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| Authentication
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Secure
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Supports multi-factor entry (PIN, key, or app).
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| Brute-force protection
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Exist
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Built-in lockout mechanisms after multiple incorrect PIN attempts.
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| Event logging
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Access event logged
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App logs who unlocked the door and at what time.
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| Passwords
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Require change after setup with complexity requirements
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Master PIN must be set up during installation; app enforces standard PIN complexity.
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| Category Score
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Score: 1 / 3
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Technical Specifications
| Property
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Details
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| Operating System & App
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Embedded Firmware (Companion App: Yale Access App)
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| Hardware (CPU / GPU)
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CPU: N/A • GPU:
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| Memory & Storage
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Memory: N/A • Storage: N/A
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| Power, Battery & Charging
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Battery: 4 x AA Batteries • Power: Battery Powered • Charging:
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| Display & Camera
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Display: • Camera:
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| Sound & Connectivity
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Sound: • Connectivity: Z-Wave Plus / Bluetooth
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| Physical (Dimensions & Mass)
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Dimensions: 1.1 x 2.75 x 7.0 inches • Mass: 4 lbs
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The Yale Assure Lock SL is a smart lock prioritizing physical security and encrypted local communications (Z-Wave/Bluetooth). While it has a low attack surface for direct remote exploitation, its security depends heavily on the connected smart home hub. Physical tampering alarms and brute-force lockout mechanisms protect the device locally. Due to its robust encryption and strict authentication, it requires a moderate level of security management.
