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The National Cipher Challenge

Yet another 10B post

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Viewing 11 posts - 1 through 11 (of 11 total)
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  • #99238
    merryxmas
    Participant

    Is it likely that 10b is a mix of all the past challenges ,using similar keys and ciphers, or is it something completely new?
    This is my first time doing this and I have no more ideas

    #99248
    DrPrasad_13
    Participant

    I am going to continue with my solving but I presume that it is a similar cipher to what we did ast year. we will have to see though

    #99270
    Napoleon
    Participant

    I have compiled a list of ideas but none seem to go anywhere.

    – Trifid Cipher (I have tried so many group sizes)
    – Substituting every three characters (e.g /// with a) and then trying vigenere or autokey
    – Morse Code with another layer afterwards (. = \ and – = ||)
    – Trifid followed by vigenere or autokey
    -Trifid followed by transposition cipher

    Dear Harry, please tell me if one of these is correct. And could the next hint be a little more revealing? Thanks.

    The clues will get more revealing, but only slowly. This is a tough cipher but if we give too much away at once it will become an easy one! Harry

    #99276
    pi_enthusiast
    Participant

    That’s basically all the things I’ve tried also! I also tried changing each symbol into 1, 2, 3 or A, B, C and trying the trilateral cipher. But everything seems to point to trifid, but I can’t get it to work…

    #99278
    RL0R_G1RL
    Participant

    Surely it can’t be the trifid cipher, as it was invented in 1902/1901/1893? (depending on sources) The story takes place in 1851, so unless time-travel exists (which is implied in the BOSS case file archives), it shouldn’t be encoded using the trifid cipher.
    That being said, I still have no clue what the cipher is. my brain has turned to mush.
    send help.

    -R

    #99279
    someone
    Participant

    How does a trifid cipher work?

    #99280
    Napoleon
    Participant

    This is what I have gone by. https://en.wikipedia.org/wiki/Trifid_cipher

    #99284
    JN
    Participant

    I want to ask how did anyone have solved 9b as I didn’t solve it and was curious.
    Hope this will get sent

    #99287
    F6EXB_the_frenchy
    Participant

    If this really is a trifid cipher, do you think Harry would have let the previous messages through?

    I don’t know, maybe a double bluff? Or a triple? Or maybe not. Harry

    #99288
    Enchantress-of-Numbers
    Participant

    it seems quite suspicious that harry would let through so much info on trifid ciphers….

    #99293
    veerz
    Participant

    I found the first hint very useful, it has helped me a lot.

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