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Ge rm an en ig ma ci ph er ma ch In ex
German Engima Cipher Machine
A digraph is a pair of letters used to represent a single letter. For example, 'NG' can be used to represent 'B'.
A digraph cipher encrypts by substituting each digraph in the message with a different digraph or symbol.
Plaintext: DIGRAPH CIPHER
The plaintext letters are split into pairs: DI GR AP HC IP HE RX
If there is an odd number of letters, the letter 'x' is used as a 'dummy' letter to complete the pair.
'DI' is encrypted by finding the intersection of the column headed by 'd' with the row headed by 'I' which gives 'QY'
'GR' is encrypted as 'TP' (column 'T', row 'P')
The ciphertext is: QY TP NR UE VR UC EJ
More information on the Digraph Cipher may be found at: http://www.simonsingh.net/The_Black_Chamber/digraphcipher.htm
Decipher the following ciphertext using the digraph key above. Good luck!
TC EU NT RT VA ZG PY CZ RP ZG PZ VT RJ