Report Support for U2F in Feature requests Posted August 5, 2016 @morten_bendtsen: Apple iOS devices are only supported up to iPad2. Everything more recent (iPad3+, iPad mini...) will not work with the linked possibilities (due to some change it the apple firmware I guess). In general I am not so sure anymore that the solution has to be U2F and that the password has to be replaced by it. A better approach seems to be adding a yubikey to the password... However, Yubikeys allow to login into Windows using HMAC-SHA1, so maybe this is the way to go when adding some security using yubikeys as a second factor.