WHERE TO START WITH CIPHERS AND CODEBREAKING. Useful links and resources.

If you want to learn more about cryptography and ciphers, here are some recommendations:

BOOKS:

• "Codebreaking: A Practical Guide" by Elonka Dunin and Klaus Schmeh
• "Cryptanalysis : a study of ciphers and their solution" by Helen Fouche Gaines
• "Solving Cipher Problems: Cryptanalysis, Probabilities and Diagnostics" by Frank W. Lewis
• "Secret History - The Story of Cryptology" by Craig P. Bauer
• Basic Cryptanalysis Field Manual 34-40-2
• "Military Cryptanalytics" by William F. Friedman and Lambros D. Callimahos:
  • Part I
  • Part II (First Section)
  • Part II (Second Section)
  • Part II (Third Section)
  • Part III

VIDEOS:

• "Cryptography for Everybody" Youtube channel by Nils Kopal
• u/LiaVl's YouTube channel (walkthroughs of different crypto challenges)

ARTICLES & TUTORIALS:

• "Monoalphabetic substitution tutorial" by u/NickSB2013 (Making a transcript and solving a simple substitution cipher written with glyphs)
• "Tyro tutorial" by LIONEL
• "Crypto Lessons and Tutorials" by LANAKI
• "Solving Cipher Secrets" by M. E. Ohaver

ONLINE TOOLS:

• Boxentriq
• dCode.fr
• CyberChef
• Bion's Gadgets
• Aperi'Solve

DOWNLOADABLE TOOLS:

• CrypTool 2 Many useful tools not found anywhere else (homophonic substitution solver, Enigma solver and others)
• CryptoCrack Offers tools for solving ciphers from American Cryptogram Association's list
• AZdecrypt The one which was used to crack the famous Zodiac's 340 cipher. Solves homophonic and polyphonic substitution, transposition ciphers and more

ADDITIONAL RESOURCES:

• Symbol cipher reference list by u/Aroktyoe
• Cypher by Matthew Brown. A first person puzzle game about cryptography