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William F. Friedman
189 pages • first pub 1941 (editions)
ISBN/UID: 9780894121982
Format: Paperback
Language: English
Publisher: Aegean Park Press
Publication date: Not specified
Description
This book, now declassified by the U.S. Government, contains heretofore unpublished methods for solving transposition cipher systems. The solution of grille systems, combined substitution-transposition systems, the ADFGVX System, and the bifid fra...
Community Reviews
Content Warnings
—
William F. Friedman
189 pages • first pub 1941 (editions)
ISBN/UID: 9780894121982
Format: Paperback
Language: English
Publisher: Aegean Park Press
Publication date: Not specified
Description
This book, now declassified by the U.S. Government, contains heretofore unpublished methods for solving transposition cipher systems. The solution of grille systems, combined substitution-transposition systems, the ADFGVX System, and the bifid fra...
Community Reviews
Content Warnings