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Happy Holidays from Hawaii (the H³ challenge)

The Body in My Library Forums Harry’s Meeting Place Happy Holidays from Hawaii (the H³ challenge)

  • This topic has 10 replies, 5 voices, and was last updated 1 month, 3 weeks ago by f6exb_the_frenchy.
Viewing 11 posts - 1 through 11 (of 11 total)
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  • #92744
    madness
    Participant

    The Hawai’ian language uses only these 12 letters:

    A, E, I, O, U, H, K, L, M, N, P, W.

    The following ciphertext is a traditional Hawai’ian song,
    which has been encrypted with a Vigenère cipher. The cipher
    is the normal one and uses all 26 English letters in the
    normal English order.

    This is all the information that you need to crack the text.
    The key is a short but familiar phrase that is appropriately
    shouted by Sandy Claws while surfing off Moloka’i this time of year.

    TIVEXAPVKMZOVAWELOOKFIRQIISKQOFEVOYWUCMNKOXEVESKLUKCZAXOTSLRKOWIUIUKOP
    ASZOKOSCYTMKKKGQFLELLVKVMIKEWEHEYKPTOSMHSKMLTMWOWQKQWAZUMETOOPZWZCMARE
    BYLERIHIXIWAXETIVEXEYIVIWAXAWEHERIYMSWZIKKQPLOOLLQUIXAXIUOFTEKPIKQWEUU
    YYTPKULXESMKKMGSVEVIVWUIMOSLGRLOEPFSKTMLKHGEXEUASQUQZAUUBYVEVALCYVMAWA
    WEWMSOXIUIXESLMEFOKUWIXIYASKMTZQKIXISSMPYMMMVEYILQYQTOSOUPFRKIZWSTGNKH
    QPFRKAFMUQUMKIZITMKOPMVIWAOHAMVIUOVCKXMUREXEFRSKTMXWWAEATETOOIVMYSQAUU
    MLZMUEVIWIZAYKMALLSNPWVIWAUAUOFERIYMGITIXEMPZRYIVIYCMLSIQPZRYESCSIYASK
    MPLRSMPSKPANEAZSFSUOLSESGLEOWESMUIXMUMMNYAUMLPYHLMOWXAO

     

    #92889
    kford_academy
    Participant

    So… I have solved the cipher (the easy bit). Now how do I read it (the hard bit)? I do not know Hawai’ian and none of the spaces are present so I can’t use Google Translate!

    #92901
    srengarajan
    Participant

    I think I have the solution but I have no idea how to check it. Shall I post it, or perhaps the key?

    #92914
    madness
    Participant

    The Hawaiian text is not the goal. The goal is the key, which is a message to everyone. Sadly, that message is in Hawaiian.

    #92921
    The_Letter_Wriggler
    Participant


    @madness
    You should have made it clear what was needed,
    I second what @kford_academy wrote (wish you hade left the spaces in, can repost with spaces in?) anyway Merry Christmas to you!

    MD5: 5f722a75cfa0378f9fd04a00e8f4737f (All Caps No Spaces, + TLW)

    #92930
    f6exb_the_frenchy
    Participant

    I solved it, but only because I heard Santa shouting.

    #92977
    madness
    Participant

    @TLW, confirmed. Now go surfing.

    #92916
    srengarajan
    Participant

    To be fair it’s not that hard to guess what the message could be considering the time of the year

    #92932
    f6exb_the_frenchy
    Participant

    This song is a song of praise of Laka.
    It can be found p. 19 in pdf :

    Nā Oli no ka ʻĀina o Kanakaʻole
    (The Chants for the Kanakaʻole lands)
    A Compilation of Oli and Cultural Practices

    Copyright 2017
    Edith Kanakaʻole Foundation
    Hilo, Hawaiʻi

    #92990
    f6exb_the_frenchy
    Participant

    Using old school methods, you can easily find the length of the keyword.
    Madness + Five-way-to-Crack-A-Vigenere-Cipher almost gives the key with a crib.
    By politely asking Google, the keyword is found.

    #93002
    f6exb_the_frenchy
    Participant

    Another way to find the key:
    Once we know the period, we divide the text into slices corresponding to the letters of the keyword.
    Then we test each slice by decoding it according to Caesar using the “brute force” method.
    The line giving letters contained only in the Hawaiian alphabet gives the key letter corresponding to the slice number.
    Once the key word has been obtained, all that remains is to decode the Vigenère.

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