Xiaomi brand 6

Classification

Device
Criterion	Value	Proof(s)	Comment
Known hardware tampering	None	[2]	The Mi Smart Band 5 has an integrated, sealed design (non-removable battery, unified casing) with no widespread hardware tampering pathways.
Known vulnerabilities	None	[3]	No major public vulnerabilities have been documented, and firmware updates address issues proactively.
Prior attacks	None	[4]	There are no prominent records of targeted attacks against the Mi Smart Band 5.
Updatability	Very common	[5]	The device receives regular firmware updates via Bluetooth for bug fixes and feature enhancement
Category score	1

System
Criterion	Value	Proof(s)	Comment
Authentication with other systems	Partial	[6]	Partially integrates with Xiaomi/Android ecosystems (e.g., unlocks phones, syncs fitness data) but lacks full cross-system authentication.
Communications	Encrypted with up-to-date encryption	[7]	Uses Bluetooth 5.0 BLE with AES-256 encryption for secure data transfer.
Storage	Encrypted with obselete encryption	[8]	Local data (fitness metrics, heart rate) protected by hardware-level encryption; cloud data uses tiered security.
Category score	2

User Authentication
Criterion	Value	Proof(s)	Comment
Account management	Basic	[9]	Supports core account functions (login, device binding) without advanced permission controls.
Authentication	Secure	[10]	Employs multi-factor authentication (password, heart rate verification, optional 2FA for Mi Account).
Brute-force protection	Exist	[11]	Locks out access after repeated failed login attempts.
Event logging	Partial logging	[12]	Logs critical events (login, firmware updates) but not all system activities.
Passwords	Require change after setup with complexity requirements	[13]	Mandates password reset after setup with complexity requirements (alphanumeric combinations).
Category score	2

Grade	A-