Nest Thermostat

Nest Thermostat
Security Grade A Calculator v1	Google Nest Thermostat Brand: Google Nest (Parent: Alphabet Inc.) Category: Smart thermostat / IoT home climate control device • Model / Gen: 2020 model G4CVZ Release Date: 2020-10-15 • Status: In sale Classification Date: 2026-10-30 • Official Website

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	None	🔗 Proof
Known vulnerabilities	Rare	🔗 Proof
Prior attacks	None	🔗 Proof
Updatability	Very common	🔗 Proof
Category Score	Score: 2 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	Full	🔗 Proof
Communications	Encrypted with up-to-date encryption	🔗 Proof
Storage	Encrypted with up-to-date encryption	🔗 Proof
Category Score	Score: 1 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Full	🔗 Proof
Authentication	Secure	🔗 Proof
Brute-force protection	Exist	🔗 Proof
Event logging	Access event logged	🔗 Proof
Passwords	Require change after setup with complexity requirements	🔗 Proof
Category Score	Score: 1 / 3

Technical Specifications

Property	Details
Operating System & App	Nest embedded OS (Companion App: Google Home App)
Hardware (CPU / GPU)	CPU: Embedded ARM MCU • GPU: None
Memory & Storage	Memory: Not publicly disclosed • Storage: Internal flash storage
Power, Battery & Charging	Battery: Rechargeable lithium battery • Power: 24V AC HVAC power supply • Charging: Charged via HVAC line voltage
Display & Camera	Display: Colour LCD display • Camera: None
Sound & Connectivity	Sound: Buzzer for alert notification • Connectivity: Wi‑Fi 802.11 b/g/n, Bluetooth 5.0
Physical (Dimensions & Mass)	Dimensions: 90 × 90 × 21 mm • Mass: 122 g