Challenge 10A
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Is it a viginere cipher? Is either the key word, the plaintext or both in Latin?
Harry I’ve got a clue:
Use all from start to end,
Nobody spared, no gaps to mend.
A familiar puzzle from times past,
It’s rule unsurpassed.Sufficiently elliptical that I feel happy to post this now! Harry
yes to the first no to the second!
Additional information:
well, the key is going quite SMOOTH, I might as well say.I have absolutely no idea how to solve this, it’s my first year and I’m kinda cooked. Can someone drop me a hint for 10A, the case file was too obscure for me to grasp any of it. Even just the type of cipher or the keyword would help?
Hope it isn’t too painful being stumped, but that is the idea with Challenge 10. Hopefully your more experienced fellow competitors will post some useful hints and tips. You should get enough to break 10A before the end of the competition, and maybe even 10B as well if you follow along with the Casefiles! Good luck, Harry
@P8S_EH
As stated earlier on the forum, you know you’re dealing with a Vigenère cipher, which will be something you have come across before in the challenges.
If you have done some IoC analysis, you might notice the peaks at length which are multiple of 13 (13,26, etc…) – see if you can infer anything from that and the hints posted above from others about the length/nature of the keyword
You can also use context around the challenges, like following the events of 9B you can reasonly infer that 10A could be a letter written by Charles Babbage to Dickens as an apology for accusing Ternan (which also links to the translated title of the challenge), which often start with “MYDEAR…” and ends with “CHARLES” which should be enough to get your started with some cribbing.
Thank you for that, I just managed to submit it. I realised I overlooked the key”word”, even though I guessed some cribs correctly before. @decrypting_donkey I like this hint! Good luck to everyone!
From start to finish but not from START to FINSIH
Finally cracked that cursed cipher! I’ve got a hint for anyone who needs help:
The keyword is the key to the English languageGood luck everyone! Time for part B 😬
help I know it is a vigenere but my codes haven’t gotten on anywhere and I have tried cribbing but it just spits gibberish back at me apart from the crib
@dogsarebrilliant
The keyword has length 26 (which is also the length of the alphabet)- see if that along with some other hints posted above helps.
You will hopefully know by now that key len=13 or a MULTIPLE kf 13 eg 26 now think what important thing to ciphers has the count of 26 so you can assume if you got what i hinted at that every character is being used just not in the right order but in an order it is not random
Hint: for challenge 10A:
Young Caesar singing the alphabet song (vigenere cipher with key the shifted alphabet defgh…a,b,c)
I am still working on 10B, but I believe this is a Solitaire cipher, so my tip would be ..Joker!
thank you!!!!
thank you for the help I have now solved it.
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