Securing React Native apps involves protecting data (secure storage, encrypted transmission), handling secrets and tokens safely, securing the JavaScript bundle, and following mobile security best practices. Security matters as apps handle sensitive user data.
Data and credential security
✓ SECURE STORAGE for sensitive data — react-native-keychain / expo-secure-store
(encrypted, keychain/keystore) — NOT AsyncStorage (which is NOT encrypted) for tokens/
credentials (a common mistake)
✓ HTTPS/TLS for all network traffic; certificate pinning for sensitive apps
✓ Don't HARDCODE secrets/API keys in the JS — the JS BUNDLE can be extracted/inspected
(anything in the app can be reverse-engineered) → keep real secrets on the SERVER
✓ Secure auth: OAuth, short-lived tokens, secure refresh; biometric auth where appropriate
