Military Cryptanalysis: Monoalphabetic Substition Systems

This text constitutes the first of a series of texts on cryptanalysis.
Although most of the information contained herein is applicable to
cryptograms of various types and sources, special emphasis will
be laid upon the principles and methods of solving military cryptograms.

Except for an introductory discussion of fundamental principles
underlying the science of cryptanalyties, this first text in the series will
deal solely with the principles and methods for the analysis of monoalphabetic substitution ciphers.