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Codebreaker badge- Researching ciphers and history of codebreaking

 Enigma:- the code was changed daily and was cracked using a machine. 

ADFGVX:- These cipher text sound different from each other when used in morse code. This is to reduce user error. This method uses a 6 x 6 polybius square. 

Playfair:- The alphabet is written in a diagram- but excluding J as the diagram is a 5x5 square. J is replaced by I. The text is split into pairs- if it's odd numbered then a z is added to the end. 

Book Cipher:- I like the book cipher. You both need the same book and would send numbers for the pages, line in the book etc. to form the message. 

Vigenere Cipher:- Uses a series of a different Caesar Ciphers. 

Caesar Cipher:- Letters are shifted a certain number of spaces.... so a becomes d. 

Homophonic Cipher:- The plaintext is replaced multiple different cipher text letters. 


During World War 2, the Enigma machine was cracked by a group of code-breakers led by Alan Turing at Bletchley Park.

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