Challenge "The SZ42 Challenge — Part 3"

Challenge "The SZ42 Challenge — Part 3"  

  By: admin on Aug. 15, 2020, 9:26 p.m.

The Lorenz SZ42, codenamed Tunny, was a German teleprinter encryption device used during WW2. This is the third challenge in a series of 13 level-2 challenges with the SZ42. Here, you are provided with 2 in-depth ciphertexts and a limitation is used. Can you recover the plaintexts?

Re: Challenge "The SZ42 Challenge — Part 3"  

  By: RandyWaterhouse on March 14, 2022, 5:43 p.m.

My solution is rejected even though I'm pretty confident it is correct. I deciphered both cipher texts (including identifying the original sources of the plain texts) and asserted that the key is the same for both (i.e. I have one key which produces the ciphers from the reconstructed plain texts). The plain texts correspond exactly to the source I found. So the last 10 characters of the first plain text are determined without much room for error, I think.

The format of the submission is the same as for parts 1 and 2 (which were accepted for me).


Re: Challenge "The SZ42 Challenge — Part 3"  

  By: RandyWaterhouse on March 15, 2022, 7:07 a.m.

To answer my own question: I accidentally swapped the two ciphers in my spreadsheet, so I submitted the wrong one's final 10 chars.

All good now ;-)

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