Cryptanalysis of the Double Transposition Cipher: Includes Problems and Computer Programs

by Wayne G. Barker

For many years the double transposition cipher has been considered a practical and secure cryptographic system. Classified SECRET for a number of years, this book -- now unclassified -- reveals that the double transposition cipher may be solved perhaps as easily as any other paper-and-pencil cipher. Text shows how to attack this cipher as if it were a single transposition cipher. Includes computer programs written in BASIC.

157 pages, Paperback

Published January 1, 1996