If opener has slam interest and holds the trump ace his first cue-bid is negative, i.e. denies control of the bid suit. Subsequent cue-bidding is standard. The problem is unsolvable, of course. You lead a red suit and if you guess wrongly, a very poor score is your due. Even so, if the leader guesses correctly nothing will have been gained.
Standard methods make location of the top trumps difficult without Blackwood.
In Part III some encryption techniques for contested auctions will be explored - here the objective is quite different. Part IV deals with opening leads and defence, where a passive key is paramount. Thanks to Marcel den Broeder of the Netherlands, who located the text of these four linked articles in a Dutch library.