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Python (half-complete) implementation of Finnish WW2 Vigenère cipher

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WormBox

An implementation of Finnish WW2 era Vigenère cipher "Salakirjoitusviivain", colloquially also known as "matolaatikko."

Known limitations

  • Uses a hardcoded letter sheet. Support for reading the key from a file exists.
  • Uses hardcoded 4th group PIAEL -3+1-3-4-2 scrambling when encrypting.
  • Uses hardcoded 4th group -3+1-3-4-2 when decrypting. The key order is brute-forced.
  • Does not support the second row of the ruler. Supported replacements:
    • Swedish numerals (1->ett, 2->tva, etc.)
    • Space encoded as X
    • Period encoded as W
    • Repeating character encoded as C.

Todo:

  • key generation

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Python (half-complete) implementation of Finnish WW2 Vigenère cipher

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