Google Nest Learning Thermostat (4th Generation)
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Security Grade
Calculator v
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Google Nest Learning Thermostat (4th Generation)
Brand: Google Nest (Parent: Alphabet Inc.) Category: Smart Thermostat / Home IoT Device • Model / Gen: 4th Generation G4CVZ Release Date: 2024-08-20 • Status: In sale Classification Date: • Official Website | |
Contents
Security Evaluation
1. Device Security
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Known hardware tampering | Rare | 🔗 Proof | Tampering requires physical disassembly; not trivial for ordinary attackers |
| Known vulnerabilities | Rare | 🔗 Proof | Few published vulnerabilities; Google patches quickly |
| Prior attacks | None | 🔗 Proof | No Mirai botnet or large-scale mass compromise incidents |
| Updatability | Very common | 🔗 Proof | Minimum 5 years of official security firmware updates |
| Category Score | Score: 2 / 3 | ||
2. System Security
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Authentication with other systems | Full | 🔗 Proof | Google account OAuth, secure pairing with Google Home ecosystem |
| Communications | Encrypted with up-to-date encryption | 🔗 Proof | TLS 1.3 for cloud traffic, encrypted Thread local communication |
| Storage | Encrypted with up-to-date encryption | 🔗 Proof | Local configuration storage encrypted |
| Category Score | Score: 1 / 3 | ||
3. User Authentication
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Account management | Full | 🔗 Proof | Google account permission control for shared home members |
| Authentication | Secure | 🔗 Proof | Google account login + optional 2FA |
| Brute-force protection | Exist | 🔗 Proof | Login rate limiting and suspicious login detection |
| Event logging | Access event logged | 🔗 Proof | Remote access and setting change events logged |
| Passwords | Require change after setup with complexity requirements | 🔗 Proof | Google account enforces strong password policy |
| Category Score | Score: 1 / 3 | ||
Technical Specifications
| Property | Details |
|---|---|
| Operating System & App | Nest OS (Companion App: Google Home App) |
| Hardware (CPU / GPU) | CPU: ARM Cortex-M4 • GPU: Not applicable |
| Memory & Storage | Memory: 256 KB RAM • Storage: 2 MB Flash |
| Power, Battery & Charging | Battery: Rechargeable lithium backup battery • Power: Mains HVAC C-wire power • Charging: Backup battery charged via C-wire |
| Display & Camera | Display: 1.57" round LCD, 320 × 320 • Camera: None |
| Sound & Connectivity | Sound: Single buzzer • Connectivity: Wi‑Fi 802.11 b/g/n, Bluetooth 5.0, Thread |
| Physical (Dimensions & Mass) | Dimensions: 89.6 x 89.6 x 22.4 mm • Mass: 122 g |
