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The National Cipher Challenge

10B

Viewing 15 posts - 1 through 15 (of 19 total)
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  • #114306
    AES_of_spades
    Participant

    Hmm I tried used OCR to exdtract every word from the given edition of a Christmas Carol, pages 21 AND 24, then ran EVERY word through the app I wrote – and all gibbersih. If anyone can give me ANY clue, no matter how cryptic, I’d be very much obliged

    10B? I hope you haven’t started on 10B yet!!! As for 9B, perhaps the Case Files will shed some light on things? Harry

    #114316
    F6EXB_the_frenchy
    Participant

    May be you should wear spectacles too.

    #114341
    decrypting_donkey
    Participant

    Harry for part B can you tell me honestly, is the key actually in a Christmas carol by Charles dickens or some sort of combo of words

    I honestly can’t tell you. Or I can’t tell you honestly and wouldn’t want to tell you dishonestly. Or something. Ho ho ho, Harry

    #114343
    Crackerjack_404
    Participant

    @person1

    If you’re desperate to find the key, you could technically go through all reasonably unique words in ACC (that’s one way to brute force it).. but even then, you may not get exactly what you want with your plaintext, or you can wait until case files is update with more details.

    #114348
    decrypting_donkey
    Participant

    “but even then, you may not get exactly what you want with your plaintext”. WHY?

    That is truly a cri de coeur! Was that a general “WHY?” as in “WHAT IS THE POINT OF IT ALL?” or a more specific question? Hard to tell. I think we will go with the first (dictionary definition of “a passionate appeal, complaint, or protest”) as that pleases me most! Muahahah! Harry

    #114310
    Geo_addict
    Participant

    Due to lack of cribs (and no success with your above method) I desperately tried an nltk dictionary attack.
    This gave me some progress … but there is still more to do! 😉

    #114353
    Cypherix
    Participant

    For 9B it seems to be a very specific print of a Christmas Carol provided so I can not find the same publication anywhere else. Therefore I have a dilemna in trying to solve 9B with the hints 9A provides…

    #114376
    decrypting_donkey
    Participant

    are all your clues red herrings

    No, though there is definitely something fishy about some of them! Harry

    #114380
    decrypting_donkey
    Participant

    I already made my own one and ive got some progress i have a word that gives partial readable text but idk what else to do

    #114393
    Crackerjack_404
    Participant

    Completely unrelated to ciphers but fun fact if you didn’t know (because for once I didn’t think about it until earlier this afternoon): a ‘red herring’ gets its name from the practice of dragging a fish (a cured herring with salt and smoked) across a trail to mislead hunting dogs, and the term was later popularised in the writings of Arthur Conan Doyle and Agatha Christie. Anyway… back to figuring out the keyword

    #114381
    Crackerjack_404
    Participant

    @decrypting_donkey

    If you manage to get some of the plaintext using the standard decryption method, you might see why the text doesn’t quite play all that fair…

    #114421
    AES_of_spades
    Participant

    Hey, SHabbat is over so I’m back. Yes sorry for callling the thread 10B that was dumb. I believe I have found the key, but the text isn’t working out perfectly – it’s kind of gibberish for some words. So when I was automating it I wouldn’t have picked up on that even if I’d had the right page… Hope that helps my fellow discouraged compatriots!

    #114354
    GREENcar
    Participant

    @AES_of_spades think laterally

    #114332
    bridges
    Participant

    Try a dictionary attack using common words, take the one that fits closest (e common, h not as common, “the” at least five times) and see which parts of it are legible and which aren’t, then figure it out.

    Looking back at the 2021 challenge can help too.

    Good luck.

    #114449
    AES_of_spades
    Participant

    Got it yesterday, thanks all especially @bridges 🙂 (Let’s leave everyone clueless, yeah? )

    Mean! But I can see why. And we delay or block hints anyway. Harry

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