outer@utcsri.UUCP (Richard Outerbridge) (04/16/85)
If this is the same four-volume set that you're thinking of, Volumes I & II have recently been reprinted by The Aegean Park Press, Laguna Hills, CA; they cover the basics and simpler varieties of polyalphabets. Volumes III and IV cover aperiodic substitution and transposition. To the best of my knowlege they are still considered CLASSIFIED by the U.S. Government. -- Richard Outerbridge <outer@utcsri.UUCP> (416) 961-4757 Payload Deliveries: N 41 39'36", W 79 23'42", Elev. 106.47m.