HUAWEI nova 12i（CTR-L81）

HUAWEI nova 12i（CTR-L81）
Security Grade B Calculator v	HUAWEI nova 12i Brand: Huawei Category: Smartphone • Model / Gen: nova 12 series (2024) CTR-L81 (Dual SIM; 8 GB + 128 GB) Release Date: 2024-03-27 • Status: Classification Date: • Official Website

Security Evaluation

1. Device Security

Criterion	Value	Proof	Comment
Known hardware tampering	Rare	🔗 Proof	ChoiceJacking tested physical USB-port access on HUAWEI nova 12i running EMUI 14. This fits the methodology's exposed-port scope, but does not demonstrate enclosure or secure-chip tampering. The paper does not specify CTR-L81. Rare is a qualitative rating of documented exposure, not a measured incident rate.
Known vulnerabilities	Rare	🔗 Proof	The study identifies USB-consent weaknesses on nova 12i and demonstrates unauthorized file access on its tested build. The regional SKU and current patch status are unspecified. Rare reflects this documented vulnerability family, not proof that current CTR-L81 firmware remains vulnerable or that other vulnerabilities do not exist.
Prior attacks	Rare	🔗 Proof	Researchers demonstrated ChoiceJacking against nova 12i under laboratory conditions, obtaining file access; ADB access required development settings. The tested EMUI attack paths required an unlocked device. This is research exploitation, not evidence of botnet participation or a criminal campaign. Present-firmware applicability remains unverified.
Updatability	Rare	🔗 Proof	An older official regional bulletin includes nova 12i in quarterly updates, but the current global list omits it. Neither omission nor a stale regional list proves that all updates have stopped. Rare is provisional: historical periodic maintenance is documented, while current cadence, support end date and installed patch level are unverified.
Category Score	Score: 2 / 3

2. System Security

Criterion	Value	Proof	Comment
Authentication with other systems	Partial	🔗 Proof	The CTR-L81 EMUI 14 guide requires the same HUAWEI ID for nearby Super Device connections (printed p.43). These are documented connection controls. The historical USB-consent bypass supports a Partial assessment; mutual authentication across every interface and the present firmware's USB behavior have not been verified.
Communications	Encrypted with up-to-date encryption	🔗 Proof	Huawei's EMUI white paper documents TLS 1.3 enabled by default for TLS connections (pp.27-28); current service documentation also describes HTTPS. This is a provisional platform-based rating of documented encrypted channels. Negotiated CTR-L81 ciphers and coverage of all apps, USB and network traffic were not tested; universal encryption is not claimed.
Storage	Encrypted with up-to-date encryption	🔗 Proof	The EMUI white paper describes XTS-AES-256 file encryption (p.22), corroborated by current Huawei password-recovery guidance describing encrypted phone data. This rating is a platform-based inference for protected internal user data. CTR-L81 cipher configuration was not measured; non-encrypted system artifacts and every partition are not covered by this claim.
Category Score	Score: 2 / 3

3. User Authentication

Criterion	Value	Proof	Comment
Account management	Basic	🔗 Proof	Huawei documents account deletion and password reset through its account center; the model guide uses HUAWEI ID for services. Basic reflects those verified account controls. Creation and deletion of restricted local users on CTR-L81 were not established. Missing evidence is not treated as proof that multi-user administration is absent.
Authentication	Basic	🔗 Proof	The model guide documents fingerprint and password verification (pp.87-88). Huawei's recovery guidance permits a destructive factory reset and requires HUAWEI ID reactivation when Find Device was enabled. Basic reflects these documented, configuration-dependent controls. Signed recovery and authentication on every CTR-L81 reset path were not independently verified.
Brute-force protection	Exist	🔗 Proof	The EMUI white paper describes increasing intervals after incorrect lock-screen passwords (p.21), supporting a provisional platform-based inference for this EMUI 14 model. Current HUAWEI ID documentation separately confirms account-attempt limits. CTR-L81 timing, hardware enforcement and automatic erasure were not tested or assumed.
Event logging	Partial logging	🔗 Proof	The official article explicitly lists nova 12i and documents sensitive-permission records, including lock-screen data access. The CTR-L81 guide confirms this on pp.91-93. Partial logging reflects this evidence; comprehensive login and filesystem auditing, export and retention were not verified. Additional undocumented logging is not assumed absent.
Passwords	Default/Common/Easy to guess	🔗 Proof	The model guide describes setting a password when enabling biometrics if none has been set (p.88), indicating an optional-lock configuration. This provisional label represents that configuration, not a shared factory password. Strong credentials are possible; mandatory post-setup rotation and enforced complexity were not established for unmanaged consumer use.
Category Score	Score: 2 / 3

Technical Specifications

Property	Details
Operating System & App	EMUI 14 at launch; present firmware and patch level unverified (Companion App: )
Hardware (CPU / GPU)	CPU: Qualcomm Snapdragon 680; 4 x Cortex-A73-based 2.4 GHz + 4 x Cortex-A53-based 1.9 GHz • GPU: Adreno 610
Memory & Storage	Memory: 8 GB physical RAM • Storage: 128 GB internal storage (assessed configuration)
Power, Battery & Charging	Battery: 5000 mAh typical; 4900 mAh rated; non-removable • Power: Rechargeable battery; USB-C charging • Charging: 40 W HUAWEI SuperCharge Turbo 2.0
Display & Camera	Display: 6.7-inch LCD; 2388 x 1080; adaptive 30/60/90 Hz • Camera: Rear: 108 MP f/1.9 + 2 MP depth f/2.4; front: 8 MP f/2.0
Sound & Connectivity	Sound: • Connectivity: Dual SIM; 4G LTE, 3G, 2G; Wi-Fi a/b/g/n/ac 2.4/5 GHz; Bluetooth 5.0 BLE; NFC; USB-C 2.0
Physical (Dimensions & Mass)	Dimensions: 163.3 x 74.7 x 8.4 mm • Mass: Approximately 199 g, including battery