org.chromium.U2F.conf

<!DOCTYPE busconfig PUBLIC
 "-//freedesktop//DTD D-BUS Bus Configuration 1.0//EN"
 "http://www.freedesktop.org/standards/dbus/1.0/busconfig.dtd">
<busconfig>
  <policy user="u2f">
    <allow own="org.chromium.U2F" />
  </policy>

  <policy context="default">
    <allow send_destination="org.chromium.U2F" />
    <!-- introspection denied -->
    <deny send_destination="org.chromium.U2F"
          send_interface="org.freedesktop.DBus.Introspectable" />
    <allow receive_interface="org.chromium.U2F"
           receive_member="UserNotification"
           receive_type="signal" />
  </policy>
</busconfig>