Encryption Cracking Contest

This is a discussion on Encryption Cracking Contest within the C++ Programming forums, part of the General Programming Boards category; IF that is the logic behind it, the first 26 letters of your key would be W V C Z ...

  1. #16
    Rebooted Inquirer's Avatar
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    IF that is the logic behind it, the first 26 letters of your key would be
    W V C Z W D W V G Z Y V N M D S Y S F F X F V K R M
    ???????????

    My logicmay be off, seing as that is a long key to remember, and that is as far as i am going to figure until i hear whether my logic is correct... but that doesnt tell me how to decrypt it regardless.

    ~Inquirer

  2. #17
    Its not rocket science vasanth's Avatar
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    Nope.. My key is very small.. it is an simple english word...

    blackwyvern and Inquirer you are right.. I have given more hnts lets look who can break it..

  3. #18
    Its not rocket science vasanth's Avatar
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    one more hint....
    The key is only 5 letters long..

  4. #19
    Pygmy Monkey ErionD's Avatar
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    Hey i want making fun of it!
    Im not good enough to solve this.....

  5. #20
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    okay, friggin mingw won't work correctly(it keeps giving me something about how WinMain@16 is undefined in some deep, dark lib file) so I'll just tell someone how I think I wouldt crack it.

    you know the period is 5, so go through the cipher text and collect positions 1,6,11,etc together. The do it with 2,7,12,17 etc.
    Then run a frequency analysis on each of the sets separately, and proceed to match up just like you would do with a Caesarian shift cipher.

    Is that how one would go about it, vasanth?
    I go to encounter for the millionth time the reality of experience and to forge in the smithy of my soul the uncreated conscience of my race.

    Windows XP consists of 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition.

  6. #21
    geek SilentStrike's Avatar
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    "Windows XP consists of 32 bit extensions and a graphical shell for a 16 bit patch to an 8 bit operating system originally coded for a 4 bit microprocessor, written by a 2 bit company, that can't stand 1 bit of competition."

    That's not true anymore... XP is an extension of 2000, which is an extension of NT, which is not based on DOS.
    Prove you can code in C++ or C# at TopCoder, referrer rrenaud
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  7. #22
    Its not rocket science vasanth's Avatar
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    Ok huys i have given you enough hints.. I will go through thge process mentioned by you FYODOR... I will check it out and reply in another few hours.....

  8. #23
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    Saw this thread earlier on in the day, and thought i'd give it a go when i got home. Downloaded your program... and this is what i got when i ran it:

    Code:
    > encdec -enc
    Enter your message to encrypt (less than 1000 characters, end with "ENTER":
    
    Hi there, how are you?
    
    Enter the secret password key > testing
    
    AM MPRXXIWXMRZAIJXM NHA TZR RSMN
    
    >encdec -dec
    
    
    Enter your message to decrypt (less than 1000 characters, end with "ENTER":
    
    
    AM MPRXXIWXMRZAIJXM NHA TZR RSMN
    
    
    Enter the secret password key > testing
    
    HI THEREEEEEETHEREE HOW ARE YOUU
    I'm not going to spend time trying to reverse engineer an encryption algo that the developer can't decode himself

    no offense mate. Fix the problems, and then i'll have a look.

    Cheers
    U.
    Quidquid latine dictum sit, altum sonatur.
    Whatever is said in Latin sounds profound.

  9. #24
    Its not rocket science vasanth's Avatar
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    Hi there,,

    The problem is you have used two symbols , and ? . My program cannot accept these symbols as of now. it can accept only alphabets. I have developed a new algorithm which accepts everything.. I will post it tommorow after checking it for bugs. But the program i have posted is prefectly fine.. Dont use any symbols or numbers but only alphabets from a to Z.

    Vasanth
    Last edited by vasanth; 04-15-2002 at 03:14 AM.

  10. #25
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    GAME OVER

    ihsir ownz joo


  11. #26
    Its not rocket science vasanth's Avatar
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    Well did u break it.. then post it...

  12. #27
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    I will, but i'm not happy with the way i did it..

    its was not the.. ummm way i want.

    so lets wait for someone other to do it and then i'll post here.

    BTW just to make it clear that "ihsir ownz joo" i'm going to PM the key to you

  13. #28
    Its not rocket science vasanth's Avatar
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    Ok if you have got it PM me... If it is correct.. I have my new encryption algorithm for me which is around 10 times tuffer than this... But first prove it now itself that you have done it..

  14. #29
    Its not rocket science vasanth's Avatar
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    Ishir Bravo you have broken my encryption... Wow..... Ok after a few others also finish it.. it would be great if you could explain it in details in laymans language to everyone how you did it.. hope you can do it...

    My next stronger encryption coming up in the next few days or may be 2 weeks...

  15. #30
    Pygmy Monkey ErionD's Avatar
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    Heyyyy we wanna know how he did it

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