A secure passphrase requirement would kill Apple overnight.<p>Low-friction UI has been Apple&#x27;s differentiator for years. If you have to take the time to type out a secure passphrase every time you want to interact with your phone, people will stop interacting with their phones (or use phones that suck less).<p>Why do you think they built Touch ID? Because typing even a 4-digit PIN is too annoying!