Handbook for Cryptanalysis

by Army Security Agency

Various versions of this book, now unclassified, were released by the Army Security Agency and its predecessor, the Signal Intelligence Agency, some fifty years ago; and recently have been furnished to the National Archives.

While the use of today's computer has supplanted many cryptographic procedures previously done by hand, there are some items described in this handbook which still remain important for today's analyst. Although seemingly minor, one of the important items which affect cryptanalyst's work is the standardization of cryptographic procedures described in chapter one. This cannot be emphasized too much. The cryptanalyst must make every effort to print letters and numerals in the manner described. A few of the chapters included in this book are as The Phi Test, The Solution of 2-Square Matrices, Statistical Methods in the Determination of Generatrices.

109 pages, Paperback

Published January 2, 2001