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 Forum index » Diversions » Perplex City Puzzle Cards » PXC: Silver Puzzle Cards
[LOCKED] [Puzzle] #243 Silver - Shuffled
Moderators: AnthraX101, bagsbee, BrianEnigma, cassandra, Giskard, lhall, Mikeyj, myf, poozle, RobMagus, xnbomb
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firefox
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Joined: 28 Jul 2004
Posts: 333

hmm, ok this was a new deck, so all cards would have been in order

Quote:
from: entropy and poker
If we buy a new deck of cards, we can immediately deal two straight flushes right off the top of the deck. (The cards in a new deck are all in order.) The entropy of the cards is low. When we shuffle the deck, the entropy increases. We start dealing lousy, high entropy, hands.


about the way the face cards are looking- seems to be a good way to look at it.

PostPosted: Fri Jul 08, 2005 4:08 pm
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BrianEnigmaModerator
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Joined: 05 Oct 2003
Posts: 1199
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tanner wrote:
just initial thoughts
star on joker means 54 identifiable cards
entropy with cards is obviously shuffle
the writing on one edge is unusual (useful for certain conjuring tricks)
also kites are diamonds = ice Very Happy

I can't see the writing/marks people are implying about the picture, but it is entirely possible that if the edges of the cards are marked in a particular way, arranging the cards in a certain order would rearrange those marks. For instance, if I took a deck of cards and arranged them so the four aces were together (in some suit order), the the four twos (in the same suit order), all the way to the kings, then wrote a message on the side, you would only see the message if the cards were in that order. If I then rearranged them (for instance A..K in one suit, then A..K in the next) or shuffled them, the marks would appear somewhat random. Maybe this is what they're going for?
Maybe I just can't see enough to know what I'm talking about.
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PostPosted: Fri Jul 08, 2005 4:14 pm
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Flidget Jerome
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SocialElite wrote:
With so little info so far almost anything is speculation, but the use of a pack of cards here reminds me quite a bit of the coding system from Cryptonomicon. Athena, it might have been called?


Solitaire. I love that book.

I've added the detailed scan of the text on the side of the card to the first post.

PostPosted: Fri Jul 08, 2005 4:15 pm
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tanner
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thats interesting text -- knew it was strange
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PostPosted: Fri Jul 08, 2005 4:19 pm
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am520dj
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Joined: 18 Oct 2004
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i forgot where to look for this or how to do it, but could the text be a solitaire cipher? *shudders at thought of virtucube*

the only thing strange about the text was the LUL, as the only group of three letters.
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PostPosted: Fri Jul 08, 2005 4:33 pm
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BrianEnigmaModerator
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Because I just typed it in for the catalog, here it is in ASCII (not sure if the bolding is on purpose or not):
Quote:
EODMF XRUTH WBBMC HGFIB LXCQY WEZFL ITHPJ LFHWY ETKWY LJOTY YNGYJ BIOGI FUVMR
XIHGU RAGXH NQHRS XAWHU FJTAM SMMOS MVBAA KPGVV WXOVM YKZPL LUL
FHURG IFULP


Why do I feel like I'm reinstalling Windows multiple times???
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PostPosted: Fri Jul 08, 2005 4:35 pm
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Leeravitz
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Looks to me like the basic (*very basic*, given my cryptographic skills!) distribution of the letters is about normal, for what I'd assume is a substititution cipher of some sort.

Possibly miscounting (!) and missing out some of the fainter text at either end (which is difficult to read via scan), the numbers work out at something like the following:

A - 5 occurrences
B-5
C-2
D-0
E-2
F-5
G-6
H-6
I-5
J-5
K-2
L-4
M-7
N-2
O-4
P-2
Q-2
R-4
S-3
T-5
U-4
V-5
W-6
X-6
Y-6
Z-1

That's not as helpful as it could be, partly because the text is very short, but it looks normal enough to me on face value.

Thus, the obvious guess would be that M, W, X are likeliest to be 'E', 'A', 'T' in some permutation...and then it gets a bit trickier...
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PostPosted: Fri Jul 08, 2005 4:38 pm
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SteveC
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At first glance, that looks like a playfair cypher to me...

PostPosted: Fri Jul 08, 2005 5:06 pm
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seannyob
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Joined: 01 Mar 2005
Posts: 4
Location: Yorktown, VA

not playfair

SteveC wrote:
At first glance, that looks like a playfair cypher to me...


It can't be a playfair cipher. It has a double letter digraph (BB) in the third string.
Reference the Playfair cipher on wikipedia.org: http://en.wikipedia.org/wiki/Playfair_cipher

Doesn't mean it isn't some sort of other square cipher, tho.

Very Happy

PostPosted: Fri Jul 08, 2005 5:35 pm
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Leeravitz
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Still wondering, if it is a square cipher, whether 'If entropy wins, outward looks will leave you cold' is somehow meant to serve as the key for the substitution. Although, from Garnet's point of view, I don't see how that would have originally been helpful...
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PostPosted: Sat Jul 09, 2005 5:10 pm
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SteveC
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Just a little bridge on this again, but I think that there has to be a link between "outward looks" and picture cards, eg, royals. And "leave you cold" and flush (which actually leaves you hot?).. So if entropy wins you'll get a royal flush....?

Still makes no sense, but maybe it'll trigger something somewhere?

The odd thing is that the joker is never used in poker (ok, not REAL poker, just home games where pople like to turn it into a game of chance with wild cards). But as (tanner?) said, marking one of the jokers gives you 54 unique cards instead of 53 or 52...

PostPosted: Sat Jul 09, 2005 7:11 pm
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Flidget Jerome
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The marked Joker I think is what's making people think of Solitaire, since that's a feature of it, but the problem with that system is you need to know the order the deck's in. I thought the message on the side might have something to do with that, but there's too many letters.

PostPosted: Sat Jul 09, 2005 8:56 pm
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SteveC
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Right....

So, this is definitely a Solitaire Cipher. I hadn't appreciated that till I just sat down and read all about them.. The "If entropy wins, outward looks will leave you cold" is certainly a clue to the "key" to ordering the deck.

The only thing is to decipher the clue (cryptic crossword?) to get the key, plug it all together and decrypt.

For what it's worth, because of the odd 3 letter "word" at the end, I guess we're talking about two cipher texts here.. Actually, come to think of it, that leaves it open to a technical attack assuming both have been decrypted using the same deck. Anyone good enough at cryptology to achieve that?

PostPosted: Sun Jul 10, 2005 6:17 am
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firefox
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Joined: 28 Jul 2004
Posts: 333

Flidget Jerome wrote:
The marked Joker I think is what's making people think of Solitaire, since that's a feature of it, but the problem with that system is you need to know the order the deck's in. I thought the message on the side might have something to do with that, but there's too many letters.


I also think it is solitaire. It all fits nicely with the clues given. for more on the actual cipher, and a better explanation as to how it fits to this puzzle> see here.


Here are my thoughts on the puzzle so far:
(thinking outloud, not just stating the obvious)

Now, the message on the side of the packet seems to be the ciphertext. We need to use it to generate a keystream (each letter in the message will become another letter based on the ordering of the deck) then working out the difference between each corresponding letter using modulo 26 (described in the above link), should give the final message. (this will make more sense if you read the above link before you read on Wink)

to explain this better i will show an example, using the first ten letters in the ciphertext:

step 1 - your ciphertext message
Code:

EODMF XRUTH


step 2 - your keystream message
after using a solitaire decryption program with passphrase: ENDOTHERMIC, output is:

Code:

AUEDQ GSKRP

step 3 - subtracting keystream from ciphertext using modulo 26
Code:

E  O   D  M   F   X   R   U    T   H
5, 15, 4, 14, 6, 24, 18, 21, 20, 8

A  U   E  D Q    G  S    K   R    P
1, 21, 5, 4, 17, 7, 19, 11, 18, 16

Code:

5-1 = 4
15-21 = 20
4-5 = 25
14-4= 10
6-17 = 15
24-7 = 17
18-19 = 25
21-11 = 10
20-18= 2
8-16 = 18

step 4 - your final decrypted message
Code:

4 20 25 10 15 17 25 10 2 18
D T  Y   J   O   Q  Y  J   B  R

or the final message as:

DTYJOQYJBR which is of course jibberish. Laughing

to get a message that actually makes sense- we need to know the correct passphrase to use when determining the keystream (step 2)

with the only hint being- "If entropy wins, outward looks should leave you cold."

now, i didnt read all of the info on the solitaire cipher so
1) did i make any mistakes? if so whoops
2) is the gist of that right, or am i looking at it from the wrong perspective?

what has everyone else done so far? personally i think this is pretty hit or miss, without the passphrase its fairly labour intensive to convert it by hand and/or trying zillions (or 54! hey same deal Rolling Eyes) of possible different combinations.

PostPosted: Sun Jul 10, 2005 9:48 am
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tanner
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well i keep playing around with this clue and not getting very far but i do know that if entropy wins then the universe is heading for the "Heat Death" = death of heat

maybe cold????

outlook is cold??
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"And the princess and the prince discuss what's real and what is not,
But it doesn't matter inside the Gates of Eden" - BD


PostPosted: Sun Jul 10, 2005 10:28 am
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