Basic Cryptanalysis

*FM 34-40-2

FIELD MANUAL
NO 34-40-2 HEADQUARTERS
DEPARTMENT OF THE ARMY
Washington, DC, 13 September 1990

part one - introduction to cryptanalysis

part two - monographic substitution systems

chapter 3 monoalphabetic uniliteral substitution systems using standard cipher alphabets
chapter 4 monoalphabetic uniliteral substitution systems using mixed cipher alphabets
chapter 5 monoalphabetic multiliteral substitution systems

part three - polygraphic substitution systems

chapter 6 characteristics of polygraphic substitution systems
chapter 7 solution of polygraphic substitution systems

part four - polyalphabetic substitution systems

chapter 8 periodic polyalphabetic substitution systems
chapter 9 solution of periodic polyalphabetic systems
chapter 10 aperiodic polyalphabetic ciphers

part five - transposition systems

chapter 11 types of transposition systems
chapter 12 solution of numerically-keyed columnar transposition ciphers
chapter 13 transposition special solutions

part six - analysis of code systems

chapter 14 types of code systems
chapter 15 analysis of syllabary spelling
appendix A frequency distributions of english digraphs
appendix B frequency distributions of english trigraphs
appendix C frequency distributions of english tetragraphs
appendix D word and pattern tables
appendix E utility tables
appendix F cryptanalysis support program
glossary
references
index