+\S{config-ssh-tis} \q{Attempt keyboard-interactive authentication}
+
+The SSH 2 equivalent of TIS authentication is called
+\q{keyboard-interactive}. It is a flexible authentication method
+using an arbitrary sequence of requests and responses; so it is not
+only useful for challenge/response mechanisms such as S/Key, but it
+can also be used for (for example) asking the user for a new
+password when the old one has expired.
+
+PuTTY leaves this option enabled by default, but supplies a switch
+to turn it off in case you should have trouble with it.
+