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One Time Pad

Tinker tailor tourist spy › Forums › Bureau of Security and Signals Intelligence Forum › One Time Pad

Viewing 8 posts - 16 through 23 (of 23 total)
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  • 21st January 2021 at 7:09 pm #53065
    Mattyrat2027
    Participant

    MSPZYKWYOHPLEXOCPKBBPMESMOIBIGONGDBYYVAYPMJMSDCIOLEXZDBVRIEWHWGDETVWPALNUJKACKLUZWYRREFATBWGTOEKUUTJTZEXLMCKUSIIAOMEXIRSGEGKBZTTVDMIQR UUVJWWTVBHQMFLUSGKIELRQYGSSQGYKRTTINEOGGBRIGWTKUAYVPFWETRVMQCFZJPWLGLSMVTVHVSOLLYGHBS

    A new one for you all. No plaintext, only a clue towards the key. It is a famous book, written in the 1800s (can’t specify the year – it’s the top of the list!) turned into multiple films, and even a LEGO set. The key takes text straight from the beginning so you won’t have to search far. One final thing – my wording was very careful in that last sentence 😉

    21st January 2021 at 11:42 pm #53091
    Madness
    Participant

    @Mattyrat2027, the challenges in this thread use Vigenere-like ways of combining the key with the plaintext, not XOR.
    The key for #53003 is a random string of uppercase letters.

    22nd January 2021 at 11:28 am #53092
    Pandarran
    Participant

    @Mattyrat2027 MD5 of PLAINTEXTPANDARRAN is 51360e5d5ef835f98d83e50d0616dd70

    I was lucky it was the first book I tried – and (I think) I remembered the website you were using

    26th January 2021 at 11:44 pm #53131
    The-letter-wriggler
    Participant

    @Mattyrat2027

    PLAINTEXT+TLW MD5: 968a7b8ffb976265e7deb94ceefef6f2

    27th January 2021 at 5:49 pm #53122
    Madness
    Participant

    Has anyone solved the two-time pad? No? OK, here’s a OTP with a randomly generated key. Good luck.

    TSZWJHBRDLQYCKIOVCCEUCHITEKCEQUUKYWUOWXCUNCZOCJXWTUGVASGODMYJOCFTLMEQOQZSEITDCWLGQHOMXNIGKEFYKU
    EGHYSZYZFDXBLFYHHRDOZZJGPTMNZCTYEULNJSEPZBNCYMLVNHWAHMHYGZQUJYNPVLTCAFVHWJEUEHOJZNTJYDDNUEKHSCB
    OCXQKBHLKMAVCFFYLFKNYAQUAJCHHFJICKSRHJPOFPGADIWYIPGWAASJOZSPMPALORNOLLBQGUNKSZ

    27th January 2021 at 9:22 pm #53146
    F6exb
    Participant

    I think you are kidding. 🙂

    27th January 2021 at 9:25 pm #53093
    Mattyrat2027
    Participant

    I didn’t get a match, but that is probably due to the fact that I misspelt 1 word in the key! Did you notice? 😉

    MSPZYKWYOHPLEXOCPKBBPMESMOIBIGONGDBYYVAYPMJMSDCIOLEXZDBVRIEWHWGDETVWPALNUJKACKLUZWYRREFATBWGTOEKUUTJTZEXLMCKUSIIAOMEXIRSGEGKBZTTVDMIQRUZSJVJGEHYORVWLPLDTEEAJWDVQOAWWGHQVAWSYBCRLXUVPHLCRENBKEKRCBAGISYGZHGXASQIHREWSLQRGS

    Amended ciphertext for anyone still trying (Encrypted with the corrected key)

    I also have a difficult OTP for everyone, with a random alphabet. I can confidently give you the key, ciphertext and plaintext, but you’ll have to work out the alphabet yourself.
    Ciphertext:
    #JPXVY+W//ERLR#XIBPYYORR#YIRAJEAD/RXP/XA-TLHEFXDSFOLRH–X#XD#UNGXYEJUOOU/SNWNZQWEJBUOZULHHSFQKP/T#RHTMXHJEFVALUJIGKLVPKIVAEMBKQHGHNJII-X-
    EEDSLGANZHZ-FT/QNQM#ETQXFIIOMW/N/IRSZJGYFWKYSGMBEMGGIKZNONNBVZKWGEVTQAXLRCOLW#ZWJT#ZXDJWHU
    Plaintext: THEONETIMEPADISACURIOUSTHINGUNDERTHERIGHTCIRCUMSTANCESITISCOMPLETELYUNCRACKABLEYETWITHASMALLHINTITCRUMBLESEASIERTHANCHALLENGESEVENBANDTHATS
    SAYINGSOMETHINGPLEASEGIVEMETHEMDFIVEOFTHEALPHABETYOURNAMEINALLCAPITALSANDNOPUNCTUATION
    KEY:
    ICOULDNTREALLYTHINKOFASUITABLETOPICSOILLRAMBLEONABOUTSOMETHINGSOTHATTHISISLONGENOUGHNOWLETSSEEWHATCOULDITALKABOUTWELLBEINGASTHISISADIFFERENT
    ALPHABETICANSAYTHATITWASRANDOMLYGENERATEDSOTHEREWONTBEANYKEYWORDTOHELPYOUSOTHENGOODLUCK

    27th January 2021 at 10:58 pm #53147
    The-letter-wriggler
    Participant

    @Mattyrat2027 OK Redone. Here is my new MD5 for your OTP-Book
    PLAINTEXT+TLW MD5: 3bf3615a810a78081bca6d44b05c3def

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