OPPO Enco Free4

OPPO Enco Free4
Security Grade B Calculator v1	OPPO Enco Free4 Brand: OPPO Category: True Wireless Stereo (TWS) Earbuds • Model / Gen: Enco Free series 4th generation OPPO Enco Free 4 Release Date: 2025-04-10 • Status: In sale Classification Date: 2025-10-09 • Official Website

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	None	🔗 Proof	OPPO's true wireless earbuds, like OPPO Enco Free 4, have strict quality control and official channels for maintenance, so unauthorized hardware tampering is rare.
Known vulnerabilities	Rare	🔗 Proof	OPPO regularly addresses security issues, so known vulnerabilities in its earbuds are not widespread.
Prior attacks	Rare	🔗 Proof	There are relatively few publicly known prior attacks specifically targeting OPPO's true wireless earbuds.
Updatability	Very common	🔗 Proof	OPPO provides regular firmware updates for its true wireless earbuds to enhance performance and security.
Category Score	Score: 2 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	Partial	🔗 Proof	Can authenticate with some OPPO - related systems, but not all external systems.
Communications	Encrypted with up-to-date encryption	🔗 Proof	Uses modern encryption protocols like Bluetooth's secure protocols for communication.
Storage	Encrypted with up-to-date encryption	🔗 Proof	Employs up - to - date encryption for any stored data (like pairing information).
Category Score	Score: 2 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Basic	🔗 Proof	Offers basic account - related functions for device pairing and simple settings.
Authentication	Secure	🔗 Proof	Uses secure methods like Bluetooth pairing with encryption for authentication.
Brute-force protection	Exist	🔗 Proof	Has mechanisms to detect and prevent brute - force attempts during pairing.
Event logging	Access event logged	🔗 Proof	Logs access events related to device pairing and connection.
Passwords	Default/Common/Easy to guess	🔗 Proof	Typically uses default or simple pairing codes that are easy to use but not highly complex.
Category Score	Score: 2 / 3

Technical Specifications

Property	Details
Operating System & App	(Companion App: HeyMelody)
Hardware (CPU / GPU)	CPU: • GPU:
Memory & Storage	Memory: • Storage:
Power, Battery & Charging	Battery: Single earbud battery: 41mAh; Charging case battery: 580mAh • Power: • Charging:
Display & Camera	Display: • Camera:
Sound & Connectivity	Sound: • Connectivity: Bluetooth 5.4, supports dual-device connection
Physical (Dimensions & Mass)	Dimensions: 20×18×21mm • Mass: 4.5g