I tried to switch on Authentication.
1) The activation uses only 1 password field and doesn't ask the user to verify the password - this is bad.
2) There is no "username" field.
3) When I try to operate a switch via iPhone app, I get an authentication dialog (as expected). This dialog has a username field with "admin" pre-set, which you cannot change.
4) Entering the correct password doesn't succeed.
5) So I had to switch off authentication in the browser again. After that, I could operate the switch again from the iPhone app without getting asked for authentication.
See images:
