It doesn't matter. You can compromise most of the phones (at least non rooted) if you or your people make the OS and thus also the OS level libraries that handl

It doesn't matter. You can compromise most of the phones (at least non rooted) if you or your people make the OS and thus also the OS level libraries that handle Text input from the IME, or even touchscreen information would be enough in most cases (unless everyone uses the randomized keyboard layout, and guard against "known plaintext" type attacks)