THE TWO-MESSAGE PROBLEM IN CIPHER TEXT AUTOKEY. PART II
Jack Levine, Michael Willet · Cryptologia · 1979
This is Part II of a two-part paper on the problem of the title. In this part the analysis of the two-message problem started in Part I is completed. In addition a brief discussion is given of a computer-assisted solution. A list of twelve two-message problems involving several types of conditions is attached for the benefit of the reader.