Please ask questions ONLY in this topic.

Re: Please ask questions ONLY in this topic.

Post by Y4rm4 on Sun Jun 13, 2010 2:43 pm
([msg=39980]see Re: Please ask questions ONLY in this topic.[/msg])

Woo!! Can't believe this one is "hard"... I found it SO easy!! Taking in account I had to look for help here for realistic three and four (well, not like I was totally lost but I needed a liiiiiitle of help with three and four.... Yeah, with four I was totally lost¬¬) and this one could be done with a piece of paper.... Refreshing!!

I've read some have done programs to do it... well, I thought of that too but it was so easy I preferred to do it with basic things as the Office programs and white sheets of paper.

I'd have done realistic 5 but if looked difficult so I jumped to this one....
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Re: Please ask questions ONLY in this topic.

Post by ___BARBARIAN___ on Wed Jun 23, 2010 11:35 am
([msg=40665]see Re: Please ask questions ONLY in this topic.[/msg])

Hey I did It ...after reading article about it on HTS , Made a VB program , to decrypt it. its a time consume level but this level has a very logic sense...any how Thanks for article.
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Re: Please ask questions ONLY in this topic.

Post by Narphet on Fri Jun 25, 2010 9:40 am
([msg=40784]see Re: Please ask questions ONLY in this topic.[/msg])

In case anyone drops by here and can't work out how to decrypt this...

1. Breaking encryption usually involves coming up with a wild hypothesis, assuming it's true, seeing how far that assumption gets you, and then trying a different hypothesis if that doesn't work. So don't feel discouraged if you feel like you're "groping in the dark" - that's how real cryptanalysts usually work.

2. When testing out the encryption program, use the simplest inputs you can think of. Think really simple.

3. (For the very uninitiated) You'll never crack any form of digital encryption if you don't know how computers encode text.

just my $0.02 :>
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Re: Please ask questions ONLY in this topic.

Post by asleep777 on Tue Jul 13, 2010 10:34 pm
([msg=41767]see Re: Please ask questions ONLY in this topic.[/msg])

Barbarian,

I am using VB also, and even though I am looking for the 13 10 combination and replacing it with vbCrLF I still can't get a little blue pill uh button that says I am a cool guy. Suggestions?

Thanks,
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Re: Please ask questions ONLY in this topic.

Post by Schultzika on Fri Jul 16, 2010 12:46 pm
([msg=41916]see Re: Please ask questions ONLY in this topic.[/msg])

Too easy.

It's all about summing and subtraction. Just figure out what to sum and what to subtract... and don't do it manually. :|
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Re: Please ask questions ONLY in this topic.

Post by madfools on Sun Jul 25, 2010 3:30 pm
([msg=42689]see Re: Please ask questions ONLY in this topic.[/msg])

Wow, this is the only realistic i managed without any forum help. I googled what the algorithm was for the XEcryption and then wrote a program using html and javascript to decrypt things if a password in decimal form were given (ie ddddd=500) or if the words the or of appeared in the decrypted text. however my computer froze part way through on the the and of ones so i had to go by each decryption individually...
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Re: Please ask questions ONLY in this topic.

Post by LoGiCaL__ on Tue Jul 27, 2010 11:51 pm
([msg=42852]see Re: Please ask questions ONLY in this topic.[/msg])

I wrote a script in javaScript to decrypt the message. The code from this link I can decrypt: http://www.hackthissite.org/forums/viewtopic.php?f=28&t=954

However, whenever I run the encrypted message from the mission through I get jibberish. I have tried "e" and " " and both yeild unreadable information. Also, I can decrypt whatever message I put into the encryption page from the mission. So I guess my question is am I missing something or is the message supposed to be not readable?

-- Wed Jul 28, 2010 8:46 pm --

Nvm, I figured it out. I was using the sort() method on an array with numbers and didn't realize you have to make a function to compare the numbers. So originally it would put numbers in lexicological order. So it would sort 10 before 2. Took some time to find. Thanks anyways.
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Decrypt Without Knowing Password

Post by r00tk1ll on Sat Jul 31, 2010 7:02 pm
([msg=43055]see Decrypt Without Knowing Password[/msg])

I found it interesting that you can decrypt the message without knowing the password, I.E.

Character = ASCII Representation of a single character
Sum Of Numbers = 1st number + 2nd Number + 3rd number

Equation:
Possible Decryption = Sum of Numbers - Character

Check all ASCII representations from 0 - 255 for the Character variable on every value in the text
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Re: Decrypt Without Knowing Password

Post by alowaniak on Sun Aug 01, 2010 12:16 am
([msg=43073]see Re: Decrypt Without Knowing Password[/msg])

r00tk1ll wrote:I found it interesting that you can decrypt the message without knowing the password, I.E.

Character = ASCII Representation of a single character
Sum Of Numbers = 1st number + 2nd Number + 3rd number

Equation:
Possible Decryption = Sum of Numbers - Character

Check all ASCII representations from 0 - 255 for the Character variable on every value in the text

Yea i pretty much did that too, the password isn't a hard obstacle since it's the same diff for every character.
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Re: Please ask questions ONLY in this topic.

Post by milux on Thu Aug 12, 2010 12:00 pm
([msg=43622]see Re: Please ask questions ONLY in this topic.[/msg])

I've written an automatic cracking program for this level in Scala.
If anybody is interested, have a look:
http://www.megaupload.com/?d=8L4FSMZR
source code and highly shriken/compressed JAR file included

Edit:
http://rapidshare.com/files/412552001/XECryption.7z
http://ul.to/csi9tu
MegaUpload doesn't seem to work properly...
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