Crack This!

This is a discussion on Crack This! within the A Brief History of Cprogramming.com forums, part of the Community Boards category; Originally posted by Carlos Their secret: a few brave indians (can't remember, but maybe Dakota), who spoke a very rare ...

  1. #16
    Mayor of Awesometown Govtcheez's Avatar
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    Originally posted by Carlos
    Their secret: a few brave indians (can't remember, but maybe Dakota), who spoke a very rare language (spoken by only a few hundred people in the world )who were taught english. The original english message was translated to their own language - which has a very hard and weird grammar and pronunciation - sent it this way, then the "encoded" message was translated by the receiver - who was of course also an indian - to english.

    The japanese were having hard times trying to decrypt those messages, but never managed to understand a word!

    This method has also it's weakness, as the japanese could have captured one of those people, but apparently this did not happen.
    And this was made into a terrible, terrible movie with Nicolas Cage.

  2. #17
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    actoully enigma is/was one of the safest ways to encrypt messages the only way you could break it was if you had the "keyword" which changes every day. And then there was some sovietien variant where they used telegrams (during the cold war) and jused the enryptation of how much each letter coast to sent (or somthing like that), but enigma was/is very safe.
    They say that if you play a Windows Install CD backwords, you hear satanic messages. That's nothing; play it forward and it installs Windows.

  3. #18
    Normal vector Carlos's Avatar
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    Originally posted by Shogun
    actoully enigma is/was one of the safest ways to encrypt messages the only way you could break it was if you had the "keyword" which changes every day.
    I read the book last year. The weakness of the Enigma is that they sent a part of the key along with the message.

    A frustrated german soled an Enigma maschine to the french, but they did not tried too hard to find out how it works.
    Later a group of pole matematicians found out some of the Enigma's secrets (even managed to reconstruct such a machine). They passed their knowledge to the British and French. Finally the scientists from "Bletchley Park" managed to decrypt the Enigma-coded messages, finding out the secret actions of the german U-boats.

    The german made a horrible mistake: they took it for sure that the Enigma is 100% safe and unbreakable.

    Even after the messages were decrypted, and the allies knew everything about the german U-boat strategies, they did not attack them in every case, thus letting the germans think that the Enigma is still safe.

    Related links:
    http://www.xat.nl/enigma
    http://www.bletchleypark.org.uk/


    ...or just perform a search on the google for Enigma.
    Last edited by Carlos; 09-08-2003 at 09:39 AM.

  4. #19
    Pursuing knowledge confuted's Avatar
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    Heh, man, I'm going to give you a quick example. Decrypt this:

    frlo

    That's all you're given. Ummm... could be any four letter word. There have been seven different four letter words so far this post... (eight now)

    niy og upi hobr piy s nimvj pg dygg. upit ,rddshr dystyd yp nrvp,r vtsvlsn;r

    I'm sure that anyone here that actually really really wanted to could crack what I just did. ESPECIALLY if I had released 300 pages worth of text like that.

    Short messages can't be deciphered, "but if you give a bunch of stuff, your message starts to become crackable." If you post your code, people here can tell you if it's possible to develop an algorithm which will decrypt messages whether they're supposed to be decrypted by that person or not.
    Away.

  5. #20
    Mayor of Awesometown Govtcheez's Avatar
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    > frlo

    Look, we don't take that kind of language lightly here.

  6. #21
    Just one more wrong move. -KEN-'s Avatar
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    Ujr7i you, cheez.

  7. #22
    Registered User major_small's Avatar
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    ...niard eht nwod seog emehcs noitpyrcne ruoy ,elbakaerb ylisae s'ti fi ,ti sdnif ydobemos ecno esuaceb ,dab si mhtirogla ruoy gnidih fo dohtem ruoy ,dias evah elpoep ynam ekil ,osla )...( srebmun ro srettel gnitaeper fo dnik emos ro ,)racecar( semordnilap emos ebyam ekil ,pleh fo dnik emos deen ot gniog er'ew ,dnoces ...tnaw uoy tahw tuo dnif ot selif 'tpyrc' ruoy fo erom deen ew ,tsriF ...seog ti ereh tub ,tpyrced ot fo hcum taht lla deen t'nod yllaer ruoy taht ,noitpyrcne ysae emos s'ereH





    Here's some easy encryption, that your really don't need all that much of to decrypt, but here it goes... First, we need more of your 'crypt' files to find out what you want... second, we're going to need some kind of help, like maybe some palindromes (racecar), or some kind of repeating letters or numbers (...) also, like many people have said, your method of hiding your algorithm is bad, because once somebody finds it, if it's easily breakable, your encryption scheme goes down the drain...
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  8. #23
    Pursuing knowledge confuted's Avatar
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    For anyone that didn't catch it, I just moved my hands over a key for my "encryption." I also quoted what I said later in the message.
    Away.

  9. #24
    Registered User CumQuaT's Avatar
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    Angry reply

    FINE!

    Someone PLEASE just tell me a place where I can send my encrypted file WITHOUT:

    a) Telling me how I'm doing it wrong
    b) Telling me they want my algorithm
    c) Telling me to read an FAQ
    d) Telling me ANYTHING unrelated to my question

    I really, REALLY, REALLY appreciate the help and advice you are giving me guys, don't get me wrong on that fact, it has been absolutely invalualble and I thank you for it, but I am good friends with a well known Australian programmer and he wrote some encryption software and just sent an encrypted file off to ASEO with no algorythm at all and they gave HIM feedback!

    I sent mine there and they won't get back to me!

    So does ANYONE know of a place where I can send JUST AN ENCRYPTED file (or two, or more) to get it (them) tested for "crackability" if there is such a word.

    PLEASE don't get me wrong. The advice you guys have given me has been FANTASTIC, but I know there are places that will have a go at cracking your encryption (other places like ASEO), but I just want some help finding them, if you guys don't want to give it a go yourselves!!!

    Ok? Thanks alot guys!
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  10. #25
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    Why are you so intent on hiding your algorithm? No one will believe it is secure without it being open for scrutiny.
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  11. #26
    l'Anziano DavidP's Avatar
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    hmm...well no matter what any of you say...I have developed the best code ever known to man...no one could ever crack the code I have created..

    mwahahahaha
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  12. #27
    Normal vector Carlos's Avatar
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    Re: reply

    Originally posted by CumQuaT
    So does ANYONE know of a place where I can send JUST AN ENCRYPTED file (or two, or more) to get it (them) tested for "crackability" if there is such a word.
    Ever heard of S.E.T.I.?

  13. #28
    Pursuing knowledge confuted's Avatar
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    Originally posted by DavidP
    hmm...well no matter what any of you say...I have developed the best code ever known to man...no one could ever crack the code I have created..

    mwahahahaha
    I've developed a better one. It's soooo good that it can't ever be decoded. Here, have a go at it...

    Code:
     
    (BTW, that's all of Google's results to the level of twenty links encoded in a single character)
    Away.

  14. #29
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    Originally posted by confuted
    (BTW, that's all of Google's results to the level of twenty links encoded in a single character)
    Pfft. I knew that.

  15. #30
    Just one more wrong move. -KEN-'s Avatar
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    Originally posted by confuted
    I've developed a better one. It's soooo good that it can't ever be decoded. Here, have a go at it...

    Code:
     
    (BTW, that's all of Google's results to the level of twenty links encoded in a single character)
    Don't lie. I decrypted it with my super-secret algocrpytosuperrythm - it's ASCII gay porn.

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