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 Forum index » Diversions » Perplex City Puzzle Cards » PXC: Silver Puzzle Cards
[PUZZLE] #251 - Silver - The Thirteenth Labour
Moderators: AnthraX101, bagsbee, BrianEnigma, cassandra, Giskard, lhall, Mikeyj, myf, poozle, RobMagus, xnbomb
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BrianEnigmaModerator
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Joined: 05 Oct 2003
Posts: 1199
Location: Pacific Northwest

Langley Moor wrote:
Am I right in thinking if it comes back with a non-sensical answer it doesn't say anything? Am just running a few ideas through it!

Correct. It only prints the whole "POSSIBLE KEY" and decryption if the decryption doesn't contain any "crazy binary" characters. (Where "crazy binary" == anything above 0x7F.)
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PostPosted: Thu Nov 17, 2005 3:12 pm
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Jaeneas
Boot


Joined: 22 Jan 2005
Posts: 62
Location: Leicester, England.

Hi

Tried the Password combis and 13labour.

Will try AAAAAAAA 10000000 over supper.

Cheers Bri - cracking app. (Geddit?)

TTFN
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PostPosted: Thu Nov 17, 2005 3:32 pm
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Langley Moor
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Joined: 27 Oct 2005
Posts: 86

As this has now been running for a couple of hours and still no sign of finishing, I was wondering - what if those fiendish designers included a couple of unprintable characters at the end just to stop this exact type of brute forcing? Not that I want to be negative, just playing devils advocate on this one...

EDIT: Right, 100,000,000 starting from aaaaaaaa came back with nothing..... thoughts, anyone?

PostPosted: Thu Nov 17, 2005 3:48 pm
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Langley Moor
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Joined: 27 Oct 2005
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Done another couple of runs, 10,000,000 starting from 00000000 and a run of randoms for the same number of trials. Am now doing another run of 100,000,000, starting from ' ' or 2020202020202020 - 8 spaces. Don't think this is working too well, I had dreams of it breaking open almost instantly Sad

PostPosted: Thu Nov 17, 2005 4:44 pm
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neuromancer
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Joined: 04 Aug 2005
Posts: 168
Location: Birmingham, UK

Langley Moor wrote:
Don't think this is working too well, I had dreams of it breaking open almost instantly


That's kinda the whole point as it's supposed to protect data. Welcome to the world of cryptography.
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PostPosted: Thu Nov 17, 2005 5:06 pm
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Langley Moor
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Joined: 27 Oct 2005
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Rolling Eyes I get that, it's just that we finally have a solid lead on how to go about breaking this code, and I'd hoped that it might be relatively easy to crack, especially given the narrowing down to only alphaneumeric characters for the code (probably!). I'll keep plugging away at this and giving it new starting points, will move on to 'bbbbbbbb', 'cccccccc', etc. once this is done.

PostPosted: Thu Nov 17, 2005 5:11 pm
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Jaeneas
Boot


Joined: 22 Jan 2005
Posts: 62
Location: Leicester, England.

Right

I've done AAAAAAAA - 10000000 (10 mil)
BBBBBBBB - 10000000 (10 mil)

and I'm doing CCCCCCCC - 100000000 (100 mil)

However I can;t be figged to work out how far throught the Hex code 10 million keys goes so I suppose I'm missing huge chunks of code.

I was assuming that there would be info on the card to do this but my head hurts.

I might try 'fivecows' when this is done.

TTFN
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PostPosted: Thu Nov 17, 2005 6:00 pm
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neuromancer
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Joined: 04 Aug 2005
Posts: 168
Location: Birmingham, UK

I'm currently trying fivecows, though it seems far too obvious.

Going back a few posts, I agree with whoever said (can't be ar$ed to see who it was that said it, sorry, typing on a PDA here!!) we should make a PXC 'dictionary' of potential keywords to try out. If anyone has any ideas for words to try, could you please post them here?
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Windows, the most successful computer virus in history...


PostPosted: Thu Nov 17, 2005 6:07 pm
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Blanchie
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Hi, new to all this so be kind Very Happy
The back of the card has Mercator and Marginal on the map. Might be worth a try ?!?

PostPosted: Thu Nov 17, 2005 6:23 pm
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neuromancer
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Joined: 04 Aug 2005
Posts: 168
Location: Birmingham, UK

I just sent an email to the guys over at distributed.net to ask if they could give me some information on how they designed their Bovine project (the project that cracked the RC5-64). Does anybody know who developed the seti@home application?

If we get enough information on how to design some largescale distrbuted computing cluster we can start working on an app and the serverside scripts to get cracking.
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Windows, the most successful computer virus in history...


PostPosted: Thu Nov 17, 2005 6:27 pm
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locqust
Unfettered


Joined: 14 Oct 2005
Posts: 545
Location: Gloucestershire UK

Ive got seti@home running now I'll see if theres a contact address
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PostPosted: Thu Nov 17, 2005 6:30 pm
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locqust
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Joined: 14 Oct 2005
Posts: 545
Location: Gloucestershire UK

Hmmm no address other than the website one. However I do have the names of the guys who developed the windows application if that helps?
Kyle Granger and David Anderson.
The web address in case no-one has it to hand is http://setiathome.berkeley.edu
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PostPosted: Thu Nov 17, 2005 6:34 pm
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neuromancer
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Joined: 04 Aug 2005
Posts: 168
Location: Birmingham, UK

Just checked the Seti@Home website (cheers locqust), and the BOINC (Berkeley Open Infrastructure for Network Computing) project sounds really good. Maybe if we're really lucky they could add our decode to their BOINC project?

Well at the very least I can at least find out how they did it.


EDIT:

Had a closer look at BOINC [URL=http://boinc.berkeley.edu/create_project.php]here[/URL] and they're giving you source code and an API to develop your own BOINC application...great stuff!!! I'll email somebody there to confirm that we can use it, then I'll get started on working out how to design the app.
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Windows, the most successful computer virus in history...


PostPosted: Thu Nov 17, 2005 6:45 pm
Last edited by neuromancer on Thu Nov 17, 2005 6:50 pm; edited 1 time in total
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locqust
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Joined: 14 Oct 2005
Posts: 545
Location: Gloucestershire UK

The entire thing is open source so I see no reason why we couldn't hijack it for ourselves Very Happy

Just spent the last 10 mins updating my seti to this new BOINC system, didnt even realise mine was out of date! Oh well!

Edit: Just been looking at the system and if it works for this card, then we could have it running as a screensaver as well as background app, that'll be fun Wink numbers and letters streaming past your eyes all the time! Matrix anyone?
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PostPosted: Thu Nov 17, 2005 6:49 pm
Last edited by locqust on Thu Nov 17, 2005 6:54 pm; edited 1 time in total
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Scott
Entrenched


Joined: 11 Sep 2004
Posts: 1140
Location: 390 Chestnut Ridge Rd, Rochester NY, 14624, USA

Jaeneas wrote:
I've done AAAAAAAA - 10000000 (10 mil)
However I can;t be figged to work out how far throught the Hex code 10 million keys goes so I suppose I'm missing huge chunks of code.

You suppose right. You are running this series:

4141414141414141 through 4141414141D9D7C1

much of which is garbage and nonesense characters.
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PostPosted: Thu Nov 17, 2005 6:52 pm
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