React Native Security Priority: P0 (CRITICAL) Store Credentials Securely - Keychain/Keystore : Use for tokens, passwords. - Never AsyncStorage : Not encrypted. Only for non-sensitive data. - Biometric Auth : Use for Face ID/Touch ID. See keychain usage reference for Keychain storage with biometric access control. Validate Deep Links - Validate URLs : Check scheme and host before navigation. - Sanitize Params : Never trust URL params. Validate and sanitize. - Token Extraction : Avoid passing tokens in deep link URLs. Use secure code exchange. See keychain usage reference for deep link URL vali…