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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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ramsfan
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Joined: 07 Sep 2005
Posts: 232
Location: holmfirth, yorks

Doubt this is of any relevance, but the 13th labour seems not to be about medusa (seen off by perseus). There seem to be 2 candidates. The less popular is the glazing of the infinite surface area of Zeus' amphora. The more popular task is fetching the golden roses in the forest of Corinth, guarded by a gorgon, but not that gorgon. Just back from seeing Roddy Frame in our local cinema. He were fantastic.
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PostPosted: Sat Nov 05, 2005 8:40 pm
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tipimike
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Joined: 30 Oct 2005
Posts: 11
Location: UK

ramsfan wrote:
Whilst the nature of the 13th labour, ie medusa seems more promising, does this website offer any leads to those who understand these things:
http://www.conmicro.cx/hercules/


Hi Ramsfan

Well done your your nice mention in the sentinal!!! Smile

Thanks for your suggestions.... unfortunately no joy with any of them, tried them all in various combinations, upper and lower case etc... absolutely nothing!!!!!

The link above is an emulator for an IBM mainframe computer so you can run progs from a main frame on a standard computer.... which doesnt really help us with this one, but interesting to know about... didnt know anyone had bothered writing one!!!

PostPosted: Sun Nov 06, 2005 7:38 am
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neuromancer
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Joined: 04 Aug 2005
Posts: 168
Location: Birmingham, UK

Hey tipimike, what language did u write ur app in? If it's not too much trouble to ask, could you email me your source code?? It may be helpful for someone to take a look at the algorithm to make sure it's all good.
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PostPosted: Mon Nov 07, 2005 5:28 pm
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lillyplop
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Joined: 17 Oct 2005
Posts: 52

OK...tonight......while the husband is out and the son is in bed pretending to be asleep......I am going to solve this card!

If it takes all night and copious amounts of coffee and proplus.... I will not stop until this card is atop my pile of solved cards.

I know nothing of encoding, decoding or tranferring, translating but I promise you I will do everything in my power to finish this card. You never know it may just need something simple, like me, to break its spirit!

After that I will be having a sacrficial burning of the most hated (so far apart from Up Up down round whatever) perplex city card in my garden, to which you are all invited!

Now if anyone wants to throw me an idea or two thats fine, I wont mind. As soon I have solved this I will let you all know.

Kindest regards

Lillyplop
(c/o Hampton Mental Asylum)

PostPosted: Thu Nov 10, 2005 9:44 am
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chichiri
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Joined: 31 Oct 2005
Posts: 207

I reeeeeeeeaaaaaaly think we should arrange all-nighters and all-dayers(for those of us like me who have more day hours free than night) to work on each silvers as hard as we possibly can together in these forums.

It'll be just like having a party on earth, but the pizza, booze and drugs will be replaced with whipsmart ice cream, ungodly difficult puzzles and ceretin.

I suggest organising it like this:

monday night: riemann
monday day: elucidate
tuesday night: shuffled
tuesday day: 13th labour
wednesday night:elucidate
wednesday day:shuffled
thursday night:13th labour
thursday day:riemann

or something like that, so that there is a day and a night for each card.

if we put all of our minds together then we might barely scrape a perplexian mind.

is it a good idea?

no da

PostPosted: Thu Nov 10, 2005 10:06 am
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ryandrew
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Joined: 21 Jan 2005
Posts: 575
Location: Manchester

Sounds good. But, how much time can you really spend on Elucidate without crying? That stuff could be anything.
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PostPosted: Thu Nov 10, 2005 12:27 pm
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chichiri
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Joined: 31 Oct 2005
Posts: 207

OK, if I can get another two confirmations on this then it'll happen, but we may have to play around a bit with the times, or we could just decide on the day which card we'll be working on.

no da

PostPosted: Fri Nov 11, 2005 6:58 am
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oliverkeers13
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Joined: 23 May 2005
Posts: 917
Location: London, UK

Von's hint
Spoiler (Rollover to View):
rccrypt

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PostPosted: Wed Nov 16, 2005 1:22 pm
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Langley Moor
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Joined: 27 Oct 2005
Posts: 86

Try putting that into google - the entire first page of links that come up bring up a decrypting program for linux. Anyone running that OS and want to download it?It might shed more light on it once we can have a look at this RC5 encryption/decryption program.

PostPosted: Wed Nov 16, 2005 1:52 pm
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BrianEnigmaModerator
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Joined: 05 Oct 2003
Posts: 1199
Location: Pacific Northwest

That is *exactly* the sort of source code I have been looking for since the very first page of this thread.
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PostPosted: Wed Nov 16, 2005 2:00 pm
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neuromancer
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Joined: 04 Aug 2005
Posts: 168
Location: Birmingham, UK

wooo!!!

Cheers oliverkeers13, I've got linux on my spare box, so I'll give it a shot. I can't believe all my many hours of googling didn't yield this page!!!

Edit: I'll see if I can get a port of this for windows users, though I can't guarantee anything.
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PostPosted: Wed Nov 16, 2005 4:32 pm
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BrianEnigmaModerator
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Joined: 05 Oct 2003
Posts: 1199
Location: Pacific Northwest

neuromancer wrote:
I can't believe all my many hours of googling didn't yield this page!!!

I hear you there!!

If anyone is interested, I have the first cut of a program that performs some automated hacking against the card data. I know it compiles and runs fine on Linux and should do the same on OS X. Likely, it will also compile and run on Windows (with Cygwin and its gcc), but I have yet to try.

Basically, all of the relevant parameters are hard-coded in the system (the card's binary data, the number of rounds, etc). You give it a starting key and a count, and it will try every consecutive key after the one you give, up to the count. It can also be told to start at a random place for the key value.

For instance, I can say:
./rccrypt 00000000dead0000 65536
It will then try the key dead0000, dead0001, ...., deadbeee, deadbeef, all the way to deadffff. The key has to be 16 characters of hex.

Giving it:
./rccrypt -r 100
will pick a key at random, then try the next 100 keys.

Giving it:
./rccrypt perplexed 100
will use the key that is equivalent to the text string "perplexed" and then try the next 100 keys. The key has to be 8 characters of text.

When it tries keys, it will only output results that look "interesting," meaning the ones that are entirely low (printable) ASCII.

If any developers want to tweak with it, there is a constant in pxc.h that lets you swap between my test data ("The quick brown fox jumped over the lazy dog" encrypted with 0xdeadbeef) and the real data.

I hope to do some significant cleanup and testing on more systems (especially Windows) later today or tomorrow.
rccrypt_1.4-pxc.zip
Description  rccrypt, with PXC additions
zip

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Filename  rccrypt_1.4-pxc.zip 
Filesize  38.55KB 
Downloaded  230 Time(s) 
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PostPosted: Wed Nov 16, 2005 4:55 pm
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WolverineFan
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Joined: 30 Dec 2004
Posts: 192
Location: Michigan/USA

BriEnigma wrote:
neuromancer wrote:
I can't believe all my many hours of googling didn't yield this page!!!

I hear you there!!


Same here! Sheesh.

BriEnigma wrote:
When it tries keys, it will only output results that look "interesting," meaning the ones that are entirely low (printable) ASCII.


Nice work Brian!

Now we just need a database of number ranges that have been tested, and an automated way to grab a new set of numbers to test. That and 2-5 years of crunching ought to do it... Smile

EDIT: Just noticed you used the 1.4 source. There's also a 1.6 available. The two have different magic numbers listed in the rccrypt.h file. Seems like that would be important, but I know nothing about encryption Smile

Version 1.6 also now has a separate program, rcc, that does the actual compression/decompression. That could complicate porting your changes.. Hopefully not.

Link to page with 1.6: http://www.ricksoft.co.uk/downloads/rccrypt/rccrypt.htm
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PostPosted: Wed Nov 16, 2005 5:16 pm
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poozleModerator
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Joined: 15 Aug 2005
Posts: 1090

Well, if anyone manages to create some sort of distributed computing program for this I'll be willing to help (got linux on another partition).

PostPosted: Wed Nov 16, 2005 5:36 pm
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BrianEnigmaModerator
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Joined: 05 Oct 2003
Posts: 1199
Location: Pacific Northwest

I can confirm that it will compile and run under Windows (with Cygwin installed, using its gcc.) The datatypes and operations upon them seem good.

I *believe* that with Cygwin, all you need is the executable and the Cygwin DLL when releasing an application and that there are no other dependencies. Attached is a Windows version of the app. It is precompiled and has the Cygwin DLL (someone please let me know if it complains about other dependencies--since everything is installed on the one Windows box I have access to, I can't really QA the prerequisites.)

Note that it is a command-line application and takes two command line parameters. At present, you can't just double-click and expect it to run.
rccrypt-windows.zip
Description  Windows version of the PXC rccrypt variant
zip

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Filename  rccrypt-windows.zip 
Filesize  586.52KB 
Downloaded  349 Time(s) 
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PostPosted: Wed Nov 16, 2005 6:19 pm
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