Amazon Echo 4th Gen (B7W64E)
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Security Grade
Calculator v
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Amazon Echo 4th Gen (B7W64E)
Brand: Amazon (Parent: Amazon.com Inc.) Category: Smart Speaker • Model / Gen: 4th B7W64E Release Date: 2020-10-08 • Status: In sale Classification Date: • Official Website | |
Contents
Security Evaluation
1. Device Security
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Known hardware tampering | Rare | 🔗 Proof | Academic teardown found Alexa skill flaws (Full Volume, Break Tag Chain); no common physical attack |
| Known vulnerabilities | Rare | 🔗 Proof | CVE-2022-25809 (CVSS 9.8 on Echo Dot) patched; KRACK on 1st-gen patched |
| Prior attacks | None | 🔗 Proof | Not part of Mirai default-credential list |
| Updatability | Very common | 🔗 Proof | Automatic OTA firmware updates |
| Category Score | Score: 2 / 3 | ||
2. System Security
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Authentication with other systems | Partial | 🔗 Proof | Alexa account + Sidewalk; voice profiles are not cryptographic auth |
| Communications | Encrypted with up-to-date encryption | 🔗 Proof | TLS for Alexa cloud traffic; Sidewalk uses encrypted channels |
| Storage | Encrypted with up-to-date encryption | 🔗 Proof | Voice recordings encrypted at rest; optional delete history |
| Category Score | Score: 2 / 3 | ||
3. User Authentication
| Criterion | Value | Proof | Comment |
|---|---|---|---|
| Account management | Full | 🔗 Proof | Amazon account with household profiles and per-user voice IDs |
| Authentication | Secure | 🔗 Proof | Amazon account supports 2FA; app login protected |
| Brute-force protection | Exist | 🔗 Proof | Amazon account lockout and verification challenges |
| Event logging | Access event logged | 🔗 Proof | Alexa History shows voice requests and smart-home actions |
| Passwords | Require change after setup with complexity requirements | 🔗 Proof | Amazon account password complexity policy |
| Category Score | Score: 1 / 3 | ||
Technical Specifications
| Property | Details |
|---|---|
| Operating System & App | Fire OS / Alexa OS (Companion App: Amazon Alexa) |
| Hardware (CPU / GPU) | CPU: AZ1 Neural Edge processor • GPU: |
| Memory & Storage | Memory: • Storage: 4 GB internal |
| Power, Battery & Charging | Battery: No battery (plugged in) • Power: 15W power adapter • Charging: N/A |
| Display & Camera | Display: No display • Camera: No camera |
| Sound & Connectivity | Sound: 360° audio, tweeter, subwoofer, 4 microphones • Connectivity: Wi-Fi 802.11a/b/g/n/ac, Bluetooth, Amazon Sidewalk |
| Physical (Dimensions & Mass) | Dimensions: 5.7 inches diameter • Mass: 1.6 lbs (795 g) |
