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Challenge "A modified homophonic cipher with reduced alphabets — Part 1"  

  By: admin on Oct. 21, 2010, 4:19 p.m.

Homophonic substitution using 3 ciphertext characters for a binary cleartext alphabet. This challenge can be solved with paper & pencil.
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 Last edited by: admin on Oct. 31, 2021, 2:54 a.m., edited 3 times in total.

Re: Challenge  

  By: e195633 on Jan. 9, 2014, 2:41 a.m.

Can you explain how to enter the answer in 0,1 format? I mean do we have to use spaces?

Re: Challenge  

  By: aurelie on Jan. 13, 2014, 11:48 a.m.

Can you explain how to enter the answer in 0,1 format? I mean do we have to use spaces?[/quote:2ucndtoi]

Hello,

The solution consists only of zeros and ones. Do not use any other characters. It could be]

I hope you can solve this challenge!

Re: Challenge  

  By: e195633 on Jan. 29, 2014, 2:42 p.m.

I have calculated the frequencies of the bigrams and changed the binary string to match the given frequencies but still my answer is wrong. Do I miss something else?

Re: Challenge  

  By: Garnet on April 28, 2016, 2:45 p.m.

Hello, I think I dont understand this chalange clearly. Can someone help me with it? When 0 is x or y and 1 is z, why the solution are not the letters changed for appropriate numbers. (0 for every x and y, 1 for every z)?

Re: Challenge  

  By: Bart13 on April 29, 2016, 1:08 a.m.

Hi Garnet,

'0' replacing by 'x' or 'y' and '1' replacing by 'z' is an example.
You have to find out by which character(s) '0' was replaced and by which character(s) '1' was replaced.

I hope this clears things up.

Re: Challenge  

  By: Garnet on April 29, 2016, 3:34 p.m.

Hi Garnet,

'0' replacing by 'x' or 'y' and '1' replacing by 'z' is an example.
You have to find out by which character(s) '0' was replaced and by which character(s) '1' was replaced.

I hope this clears things up.

Yeah now I understand better where is the problem in my solution. Thank you. I hope I will solve this challenge in no time now.

Re: Challenge "A modified homophonic cipher with reduced alphabets — Part 1"  

  By: csk98 on Oct. 3, 2023, 4:44 p.m.

Hi guys,

I need a bit of help i am pretty sure i nailed this but it still sais it's wrong. I mean i got the statistics right and still no luck :) I guess i should not put the solution (that i think of) here.

 Last edited by: csk98 on Oct. 3, 2023, 5:18 p.m., edited 1 time in total.

Re: Challenge "A modified homophonic cipher with reduced alphabets — Part 1"  

  By: newton on Oct. 4, 2023, 2:07 p.m.

Hi,

the first part of your submission is correct, a second part is not. You're close!

Re: Challenge "A modified homophonic cipher with reduced alphabets — Part 1"  

  By: Zidnerpa on March 2, 2024, 2:24 p.m.

Hi everyone,

I'm in the same case as csk98: I think my statistical analysis is correct, but the system says that the solution entered is wrong. Is there anyone who can take a look? Thank you very much in advance

Re: Challenge "A modified homophonic cipher with reduced alphabets — Part 1"  

  By: Theofanidis on March 2, 2024, 4:07 p.m.

Dear Zidnerpa,

Send me a PM with your findings and i will compare it with the correct ones

Kind Regards,

George Theofanidis-Nikodimou

 Last edited by: Theofanidis on March 2, 2024, 4:09 p.m., edited 1 time in total.

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