Codebreaking: a practical guide

Preface

How can I break an encrypted message? And other introductory questions

The Caesar cipher

Simple substitution ciphers

Simple substitution ciphers without spaces between words: Patristocrats

Simple substitution ciphers in non-English languages

Homophonic ciphers

Codes and nomenclators

Polyalphabetic ciphers

Complete columnar transposition ciphers

Incomplete columnar transposition ciphers

Turning grille transposition ciphers

Digraph substitution

Abbreviation ciphers

Dictionary codes and book ciphers

Additional encryption methods

Solving ciphers with hill climbing

What next?

Appendix A: Kryptos

Appendix B: Useful language statistics

Appendix C: Glossary

Appendix D: Morse Code

Appendix E: Figure sources

Appendix F: References

Index.