How to Use Flipper Zero to Test Smart Lock Vulnerabilities

How to Use Flipper Zero to Test Smart Lock Vulnerabilities (Your Own) If you own a smart lock or access control system, Flipper is a useful tool for understanding its security. This guide covers testing only systems you own. Types of Smart Locks and What Flipper Can Test Testing RFID-Based Locks 1. Read the provided key fob with Flipper (LFRFID → Read) 2. Note the key type and ID 3. Emulate with Flipper — does the lock open? 4. If yes: the lock uses a simple fixed-ID system with no encryption This is a common vulnerability in cheap access control systems. Many inexpensive RFID locks will open with any cloned fob. Testing NFC Key Cards 1. Read the card (NFC → Read) 2. Check what data Flipper can access 3. Try to read all sectors — if sectors are open with default keys, the system is weak 4. Test emulation — if it opens the lock with just UID, that's a security issue What Good Locks Do Rolling codes (change with every use) Encrypted sectors requiring specific keys Mutual authentication (lock and credential verify each other) Audit logs (you can see every entry attempt) Improving Your Own Security If Flipper can clone your access credential: Upgrade to a system using DESFire or MIFARE Plus Enable mutual authentication if your system supports it Use multi-factor (PIN + card) Documentation Keep notes on what you test: Lock model, firmware version Which attacks worked/failed Recommended upgrades

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