A special National Cipher Challenge for extraordinary times › Forums › Bureau of Security and Signals Intelligence Forum › Challenge 7
Tagged: hint
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18th May 2020 at 7:13 pm #48358Inactive
You can do it @galaxywolf! I didn’t get my challenge 6 solution in until Tuesday last week. There is still time!!
If you’ve got the Caesar shift applied (so the frequency counter shows your interim plaintext as being in line with standard English), look for certain key words (such as the title of challenge 7B) jumbled up in the opening line! Would it help if I told you there were exactly 5,040 permutations (what does that tell you about the length of the keyword)?
18th May 2020 at 7:22 pm #48359Inactive@Galaxywolf and all others needing to know.
You will not be able to solve the transposition unless you have the correct ciphertext.
To get it you need the orginal ciphertext to be decrypted with the correct Caesar shift.
How do we know which is the right shift?
Simply test each shifted decrypt with the frequency utility.
The right one will be the one that best fits to English (all bars are almost equal side by side)
For the transposition, ha, you will be in seventh heaven when you solve it!I will post a slightly cryptic but direct hint.
But when Harry will put it up I do not know.18th May 2020 at 8:10 pm #4836110degrees-adminKeymaster@puttputt86 @the-letter-wriggler that will be where I went wrong, I’ve been trying to solve the transposition first
18th May 2020 at 8:40 pm #4836210degrees-adminKeymasterI am trying all words of said length, but I cant find the correct answer!
Is gunnerside written in the first few words? Something that looks like it keeps appearing!18th May 2020 at 9:08 pm #4836410degrees-adminKeymasterI have now got the key number but how do I apply this to the interim text without doing every one by hand
18th May 2020 at 9:23 pm #4836510degrees-adminKeymaster@bobobobobobofrog It helps to put it into a table, Microsoft Excel and Google Sheets are good because they let you rearrange the columns 🙂
19th May 2020 at 9:35 am #4837310degrees-adminKeymasterHelp! I’m almost there, but get an odd ending to the answer ‘at the scen-topr’. The rest of the answer looks fine, so I don’t know what happened to the end and I can’t submit it!
[Have you translated the entire text? If you miss a bit somewhere there might not be the right number of letters for the decrypt. Harry]
19th May 2020 at 11:05 am #48375Inactive@Field_agents It looks like part of your ciphertext has got cut off – there should be another ~400 letters that you need to decrypt. Also, the “-” in “at the scen-topr” should be a letter?
19th May 2020 at 11:52 am #4837810degrees-adminKeymastermany thanks for all the hints – I got there in the end!
19th May 2020 at 12:08 pm #48360InactiveMy cryptic hint.
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the key is before your very eyes if you:
Do A Good Easy Calculation – Beat Failure19th May 2020 at 1:05 pm #4838210degrees-adminKeymasterOK, so the key is 7 letters long and the shift is 16, what else?
19th May 2020 at 1:13 pm #4838310degrees-adminKeymasterAm I right so far?
19th May 2020 at 1:50 pm #4838510degrees-adminKeymasterGuys?
19th May 2020 at 2:19 pm #4838610degrees-adminKeymaster@the-letter-wriggler what does that mean?
19th May 2020 at 2:19 pm #48387Inactive@Galaxywolf Carefully read my #48359 post.
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