ADFGVX cipher: Difference between revisions
Added a note to the task description about 'columnar transposition'.
(Added a note to the task description about 'columnar transposition'.) |
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The workings of the cipher are described in the Wikipedia article, linked to above, and so will not be repeated here.
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These should then be used to encrypt the plaintext: '''ATTACKAT1200AM''' and decrypt the resulting cipher text. Display here the results of both operations.
;Note
As it's unclear from the Wikipedia article how to handle a final row with fewer elements than the number of characters in the key, either of the methods mentioned in [https://en.wikipedia.org/wiki/Transposition_cipher#Columnar_transposition Columnar transposition] may be used. In the case of the second method, it is also acceptable to fill any gaps after shuffling by moving elements to the left which makes decipherment harder.
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