Minimize Permissions: Only ask for permissions that are essential for the app to function.Obfuscate Code: Use tools like ProGuard to obfuscate your code and make it harder for hackers to understand.Encrypt Sensitive Data: Store sensitive data locally in encrypted form using the EncryptedFile API or libraries like SQLCipher for databases.Implement Strong Authentication: Use proper authentication methods like OAuth2 and JWT for secure user verification and authorization.