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 Forum index » Diversions » Perplex City Puzzle Cards » PXC: Silver Puzzle Cards
[Puzzle] #243 Silver - Shuffled Part 2 (Read 1st Post!)
Moderators: AnthraX101, bagsbee, BrianEnigma, cassandra, Giskard, lhall, Mikeyj, myf, poozle, RobMagus, xnbomb
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BrianEnigmaModerator
Entrenched


Joined: 05 Oct 2003
Posts: 1199
Location: Pacific Northwest

arnezami wrote:
It appears Lloyd Miller's implementation of the solitair cipher has a nasty bug in it! I've been trying to use it for changing deck orders etc.


Interesting... I find it a little odd that the test vectors didn't find the bug, but in encrypting/decrypting the Perl version against the C version, I do see that things are buggy and that your fix solves the problem. (Maybe you should email Lloyd Miller and/or Bruce Schneier to let them know?)

I've updated my program with the fix and am rerunning it right now. Fortunately, only half of the output was affected by the bug (because it cycles through both with and without a password.)

Good catch!
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PostPosted: Mon May 01, 2006 4:28 pm
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arnezami
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Joined: 14 Apr 2006
Posts: 136

BriEnigma wrote:
arnezami wrote:
It appears Lloyd Miller's implementation of the solitair cipher has a nasty bug in it! I've been trying to use it for changing deck orders etc.


Interesting... I find it a little odd that the test vectors didn't find the bug, but in encrypting/decrypting the Perl version against the C version, I do see that things are buggy and that your fix solves the problem. (Maybe you should email Lloyd Miller and/or Bruce Schneier to let them know?)

I've updated my program with the fix and am rerunning it right now. Fortunately, only half of the output was affected by the bug (because it cycles through both with and without a password.)

Good catch!

Indeed. Its quite irritating the test vectors didn't test correctly... I mean isn't that what they are supposed to do? Grrrrrrrrr....

I know the feeling. Man I felt desperate at some point when I just couldn't see it.

In fact it was your choice of the default key "SHUFFLED" which made me detect it in the first place so without you I would probably have never noticed it. I think in the end we got lucky by detecting it at all. Seems the source code dates a couple of years old and nobody has noticed this bug yet. Maybe a good idea to mail both Miller and the creator of this cipher which should (at least) give good test vectors!

Regards,

arnezami

PostPosted: Mon May 01, 2006 6:56 pm
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trevor_jarvis
Boot

Joined: 01 May 2006
Posts: 18

Hmm ok I guess this my first posting and probably won't be my last.

Looks like I might be able to possibly help with this one.

The only thing I need is a little help back..

Ok I guess we all are looking kinda at this card being a solve on the solitaire system, so here we go this is my idea..

What we need to do to solve the card.

I'm using this website as a basis for this http://www.schneier.com/solitaire.html

1. Find the phrase to encode/ key or *shuffle* the deck.

I believe this could quite easily and simply be "ifentropywinsoutwardlooksshouldleaveyoucold"

If I could follow the example on schneier' website I might actually be able to create a deck formation myself but either its not clear enough, I'm too tired or my brain just won't accept the method of stacking the cards. If someone could figure out the order of cards and post it that would be great. and if someone could double check even better Smile

please not the initial deck order out of the pack may be relivant, ie the stacking of cards may not be started from tthe standard bridge ACE-KING , CLUBS DIAMONDS HEARTS SPADES JOKERS orientation.

2. Find the 10 letter code to unscramble the code.

Again fromt the example on schneier' website this should be 10 characters long .. possible answers for this would be the 2 sets of 10 heat sensitive letters on each line. (presumably 2 sets of codes to undo?) or could be something like *motor brand* the brand of the pack of cards.

I would expect once the card stacking has been completed this would be easy to to check.

3. nothing much else

I hope this kinda helps.. I have MOST of the last 50+ pages and have come to the same conclusions as the rest of you but unless someone can either explain how to set the deck or actually show me the set deck I can't see me getting much further.

Sorry for typo's its late -- or even early..

Trevor_Jarvis

PostPosted: Mon May 01, 2006 9:41 pm
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UKver2.0
Decorated

Joined: 09 Feb 2006
Posts: 270

Re: Assumptions

Joe_the_OOF wrote:
May I point out that everyone working on this card seems to be making
two assumptions that may not be true:

1. That the card can be solved.

2. That the card can be solved by reasonable means, e.g. without resorting
an exhaustive search.

Both of these assumptions are unproven, at least by the postings and
replies from the oublisher that I have read.

Card number 238 is acknowledged to have no known solution. Mindcandy
has been quoted in part as saying: "... to date, no one on Earth has
succeeded [in solving this puzzle]." For the full quote and references,
go to wiki.incognitus.net/ppc/index.php/%25s and search for Reimann.

Card number 251 is an example of a card that cannot be solved withiut
a huge investment in computer time.

I suspect that if any of you owning this card were to email the publisher
and driectly challenge them with the question "Do you have proof of
solutiobn? -- That is, has an expert you hired been able to solve this
card with fewer than 10 failed attempts?" That Mindcandy would give
you an honest answer.

I am not asking them to respond to this question because I am not
one of their customers, and I do not know whether any of you
working on the puzzle really want this information.


I sent your post to Customer Service and here is the response I received:

Perplex City Customer Services wrote:
Hello David,

Thanks for your email.

Shuffled can be solved and does have a solution in the database. It is
possible to solve this card through 'reasonable means'.

Regards,

Perplex City Customer Services


PostPosted: Tue May 02, 2006 3:04 pm
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themandotcom
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Joined: 28 Apr 2006
Posts: 136
Location: Syosset, New York, USA, Earth, Milky Way Galaxy, Universe

I was thinking... the quote, if entropy wins... i think it could have two meanings, the heat sensitive text and someone working on the inside. Entropy can mean by m-w.com
CHAOS, DISORGANIZATION, RANDOMNESS
so, if disorganization wins, then outward looks leave you cold, outward meaning out of his "circle" so someone working close to Garnet could be the culprut.

PostPosted: Wed May 03, 2006 6:57 pm
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Guin
Unfettered


Joined: 11 Jan 2006
Posts: 400
Location: Antartica

themandotcom wrote:
I was thinking... the quote, if entropy wins... i think it could have two meanings, the heat sensitive text and someone working on the inside. Entropy can mean by m-w.com
CHAOS, DISORGANIZATION, RANDOMNESS
so, if disorganization wins, then outward looks leave you cold, outward meaning out of his "circle" so someone working close to Garnet could be the culprut.


We sort of already know this as an email from Garnet confirmed that Sente was indeed involved but he would not divulge any further information until we told him what the message said.

Search is your friend
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PostPosted: Thu May 04, 2006 6:10 am
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BluesScale
Boot

Joined: 06 Mar 2006
Posts: 14

(puts on trout proof hat)

I have read both post and the wiki and I didn't see this but I may have been stupid.

Maybe we have to make the vanishing letters vanish from the main text block to have a valid message?

Gentlemen, trout away

Blues

PostPosted: Sun May 07, 2006 11:09 am
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aliendial
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Joined: 29 Sep 2002
Posts: 3438
Location: Far Far Away. Nowhere Near You. Really.

No trout, but it would help if you would do a little of the work instead of throwing out an idea and then ducking. Not the solve, but what is the result of your idea?
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PostPosted: Sun May 07, 2006 11:29 am
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BluesScale
Boot

Joined: 06 Mar 2006
Posts: 14

A valid question. The answer is that I don't know yet but that I will try to find out.

I thought that the idea might be of interest so posted it before working through the options.

[ETA] Doesn't seem to help at all with an unordered deck and there doesn't seem to be a "d" to delete.

Blues.

PostPosted: Sun May 07, 2006 11:49 am
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Mallerton
Kilroy

Joined: 08 May 2006
Posts: 1

I have been looking at this card for some time now, and have read through the posts. I figured I might as well add on my own views, just to throw them into the melting pot. I apologise in advance if I recap previously mentioned items, feel free to trout me Smile

I feel that the passage on the card, and the image of the pack are 2 separate parts to the same puzzle.

Taking the passage first, there is no mention to the markings on the outside of the pack only to the fact that one of the jokers had been marked with a star. This implies that the pack had been opened, and possibly already shuffled when he looked at the cards. It only says that the cards were new and not that the pack was fresh. It makes out that he decoded the message, using just the phrase "If entropy wins, outward looks should leave you cold." and the ordering of the cards laid out infront of him.

Moving onto the image behind the passage. I beleive this is where the puzzle scribe is giving us the ordering of the deck for the solitaire cypher. And that we should base it first on the initial ordering of a pack of motor brand cards(hence the pack clearly showing the seal), and shuffle them in someway based on the coded message along the edge (most likely minus the heated characters).

From these assumptions I believe the ciphertext is based solely on the "If entropy wins, outward looks should leave you cold.", and the characters "WBBMC ..." are there to show us the pack ordering only.

I know I haven't really said anything new or ground breaking, but felt it would help me to put them down on the forum before ideas started to fall out of my head. I just need to figure out that pack ordering now Very Happy

PostPosted: Mon May 08, 2006 6:23 pm
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Confused
Guest


Has anyone thought that the cards may not be playing cards but tarot cards ? Despite the box saying casino quality playing cards the star (or pentacle) is a suit in tarot cards and the text does not mention the cards are playing cards, the box may have been a disguise.

Just an idea . . .

PostPosted: Mon May 08, 2006 7:10 pm
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trevor_jarvis
Boot

Joined: 01 May 2006
Posts: 18

These cards are real I own a red pack myself the order of the new deck has been posted.

I have asked if anyone actually knows how to use the
encrypting system mentioned so many times before. (and just to note most of the decryption programs are based on the fact that you know the deck order and input through a txt file) I can't figure out how to split/ shuffel the deck myself and have asked for help as I am sure this is the key to it all (to make the deck order), as described the deck shuffle is a long and tedious job to do by hand maybe someone could make a deck ordering program to find the starting order?

It pains me as I think we are so close but noone will say *yes* I can do it.

PostPosted: Tue May 09, 2006 3:05 pm
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echidna
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Joined: 28 Jan 2006
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Location: Notts, UK

trevor_jarvis wrote:
I can't figure out how to split/ shuffel the deck myself and have asked for help as I am sure this is the key to it all (to make the deck order), as described the deck shuffle is a long and tedious job to do by hand maybe someone could make a deck ordering program to find the starting order?

If you read through the first Shuffled thread quite a few people have worked on keying deck orders, such as this one by GuiN. As the saying goes - Search is your friend Wink .
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PostPosted: Tue May 09, 2006 3:37 pm
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trevor_jarvis
Boot

Joined: 01 May 2006
Posts: 18

echidna wrote:
trevor_jarvis wrote:
I can't figure out how to split/ shuffel the deck myself and have asked for help as I am sure this is the key to it all (to make the deck order), as described the deck shuffle is a long and tedious job to do by hand maybe someone could make a deck ordering program to find the starting order?

If you read through the first Shuffled thread quite a few people have worked on keying deck orders, such as this one by GuiN. As the saying goes - Search is your friend Wink .


Shame it deosn't actually say what the deck order was after it was primed. only states deck order before and letters produced.
deck order need s to be primed / keyed before you run the lettes through it.

PostPosted: Tue May 09, 2006 4:30 pm
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Stratman
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Joined: 03 Feb 2006
Posts: 81
Location: Kettering UK

I will try to clarify as I see it
Deck order...
Only Garnet knows the deck order (and probably the person who gave him the deck)
Garnet may have left a clue to the deck order on the card (Shuffled) - if he did, no-one has figured out what it is yet. Quite a few possibilities have been investigated.
The deck order can be decided by a passkey (a word or phrase or just a series of letters) - the Solitaire program linked below (and many times in the threads) will sort the deck order from the passkey for you. If there is a passkey, no-one has figured out what it is yet. There are many possibilities.
The deck order may be as in a new deck of Motor cards - we know that and it has been posted.
I would advise reading the first thread on this where a lot of good (but unfortunately unsuccessful) work was done.

http://cif.rochester.edu/~la002k/solitaire.htm
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PostPosted: Tue May 09, 2006 6:00 pm
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