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Challenge "Weakened Handycipher — Part 4"  

  By: admin on June 28, 2016, 8:08 p.m.

The Weakened Handycipher challenges serve as an exercise and use an intentionally weakened version of Handycipher. Part 4 is the same as Part 1, but uses an improved version of the cipher. You are given the first 1,009 characters of the plaintext, and some partial information about the key.
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Re: Challenge "Weakened Handycipher — Part 4"  

  By: curmudgeon on Aug. 6, 2016, 5:33 p.m.

The following text has been added to the challenge description in order to eliminate an ambiguity:

Remark: The end of each sentence is determined by a letter pair ". " or "? " which
is not part of an ellipsis, an abbreviation, or a quotation attribution.

Re: Challenge  

  By: nicosPavlov on Feb. 7, 2018, 2:35 p.m.

Just in case someone runs into the same problem as me: there is apparently a bug in some python versions, which causes the attached script handycipher_v3.1.py to fail. It happened with Python version 3.4.7 for me.

It is possible to fix the issue by replacing "string.maketrans" to "str.maketrans" at line 504 of the script.


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