## The enigma of @YOUGAKUDAN_00

A forum for good logic/math puzzles.

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mabeuf
Posts: 1
Joined: Wed Oct 02, 2013 3:52 pm UTC

### The enigma of @YOUGAKUDAN_00

As is mentioned in this weeks what if (65), twitter user @YOUGAKUDAN_00 outputs thousands of tweets per day, mainly in binary.

I can't find any explanation of meaning online, and I cant find a pattern myself, other than converting to ascii gives discrete, semi-colon bound units starting '&#' followed by an integer.

His last 3 posts are:
0000001011101011011111110110010100011001011000110000000111011111100010000000100001111110000111001101010110011110100001111001
10101011 01001101 11100000 01000011 11011010 10101110 00001111 01011001 11110011 11011110 11111011 10010000 11001011 11110100 01011011 00000100
0000101010010110010010011101011000000000100011111011101100101000111100011101001100101110111101111001100010110110011101011100

Any ideas?

zighier
Posts: 5
Joined: Wed Feb 15, 2012 10:33 am UTC

### Re: The enigma of @YOUGAKUDAN_00

How are you converting to ASCII?
From what I can find, & in ASCII is 0x26 (0010 0110 in binary), and that doesn't seem to be anywhere in the tweets you've listed.

If you are getting things like "&#0000;", could they be HTML/XML character references?

wraith
Posts: 98
Joined: Mon Aug 06, 2007 6:58 am UTC
Contact:

### Re: The enigma of @YOUGAKUDAN_00

Also you should consider that he's Japanese, and the binary might be Japanese in UTF8 (or other) encoding.

Or, also, complete randomness
It's only when you look at an ant through a magnifying glass on a sunny day that you realize how often they burst into flames

mward
Posts: 121
Joined: Wed Jun 22, 2011 12:48 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

It could be the Twitter equivalent of a Numbers station http://en.wikipedia.org/wiki/Numbers_station

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

Here is an example convertet to ascii. Mind that I had to prepend four zeros to make the length a multiple of 8

00000111000000001000001110000111100000001001011111100110100010000110001001011001001100100100010001000011111001001110010111110010
&#402;&#8225;&#8364;&#8212;&#230;&#710;bY2DC&#228;&#229;&#242;
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

Xias
Posts: 363
Joined: Mon Jul 23, 2007 3:08 am UTC
Location: California
Contact:

### Re: The enigma of @YOUGAKUDAN_00

lorb wrote:Here is an example convertet to ascii. Mind that I had to prepend four zeros to make the length a multiple of 8

00000111000000001000001110000111100000001001011111100110100010000110001001011001001100100100010001000011111001001110010111110010
&#402;&#8225;&#8364;&#8212;&#230;&#710;bY2DC&#228;&#229;&#242;

Converts to

ƒ‡€—æˆbY2DCäåò

Elmach
Posts: 155
Joined: Sun Mar 13, 2011 7:47 am UTC

### Re: The enigma of @YOUGAKUDAN_00

lorb wrote:Here is an example convertet to ascii. Mind that I had to prepend four zeros to make the length a multiple of 8

00000111000000001000001110000111100000001001011111100110100010000110001001011001001100100100010001000011111001001110010111110010
&#402;&#8225;&#8364;&#8212;&#230;&#710;bY2DC&#228;&#229;&#242;

The &#abc; is how your computer represents characters that have no standard ascii representation.

The_Catman
Posts: 1
Joined: Tue Oct 08, 2013 9:08 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

He/she/it seems to post the binary in blocks, as of this post the most recent block was 2hrs ago with the one before that at 5hrs. (Actually, as I was typing this he posted a new block.)

I tried handling just the 2hrs block through listing in chronological and timeline order, inverting the digits, reversing the strings and every combination thereof and got nothing. It doesn't seem to be art either.

There must be a secondary layer of encoding, or an alternative form of binary (I've been assuming 8-bit, but he may be using some sort of 4-bit or 16-bit system?).

Or it's just gibberish

rythaq
Posts: 2
Joined: Wed Oct 09, 2013 10:47 am UTC

### Re: The enigma of @YOUGAKUDAN_00

Xias wrote:
lorb wrote:Here is an example convertet to ascii. Mind that I had to prepend four zeros to make the length a multiple of 8

00000111000000001000001110000111100000001001011111100110100010000110001001011001001100100100010001000011111001001110010111110010
&#402;&#8225;&#8364;&#8212;&#230;&#710;bY2DC&#228;&#229;&#242;

Converts to

ƒ‡€—æˆbY2DCäåò

This seems like the bits are encoded incorrectly. I encoded it to a Japanese encoding and received "bY2DC" which seems to be closer to what we want.

Elmach
Posts: 155
Joined: Sun Mar 13, 2011 7:47 am UTC

### Re: The enigma of @YOUGAKUDAN_00

rythaq wrote:
Xias wrote:
lorb wrote:Here is an example convertet to ascii. Mind that I had to prepend four zeros to make the length a multiple of 8

00000111000000001000001110000111100000001001011111100110100010000110001001011001001100100100010001000011111001001110010111110010
&#402;&#8225;&#8364;&#8212;&#230;&#710;bY2DC&#228;&#229;&#242;

Converts to

ƒ‡€—æˆbY2DCäåò

This seems like the bits are encoded incorrectly. I encoded it to a Japanese encoding and received "bY2DC" which seems to be closer to what we want.

rythaq
Posts: 2
Joined: Wed Oct 09, 2013 10:47 am UTC

### Re: The enigma of @YOUGAKUDAN_00

Ah, I see. I suspected that it wouldn't work. It's possible that it can still be text. The seemingly random characters from above looked like the text in some Japanses websites that encode the text differently. I'll try to check later to see if there is actually something to be found.

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

It might not be some ascii encoding at all.
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

Arcorann
Posts: 16
Joined: Sun Mar 31, 2013 12:06 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

I've tried a couple of things on these two tweets (posted together about 23:59 UTC):

0001000101011110111101001011111110000001101010010011101001001000011000100110100001100110010001010010010100000101100001110100
0000110011011111011000011000001011110111001010010010111100100101001101010100101100111000100001101010001000111010001100110101

Unfortunately I can't seem to work out the encoding at the moment - every combination I've tried so far gives me bytes of <32 value. Is anyone willing to dump a few blocks' worth of tweets for us?

As an aside, it seems that the owner of the account is the creator of the Japanese Twitter program Venetter and he sometimes posts real tweets to the account. I might look up some Japanese sites to see if they have any insights.

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

Which helps the notion that it may not be based on ascii or anything similar. Maybe it's just the digits of pi in base 2 or something like that.
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

SnoringFrog
Posts: 8
Joined: Thu Oct 31, 2013 7:30 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

I have a dump of approximately 10 hours worth of tweets from today, only including purely numeric tweets (it started tweeting some full-numeric, non-binary tweets today) up on pastebin, but the forum's not letting me share the link. The pastebin is aCFN4LyQ, if you want to type the URL manually.

I'm putting most of it into a spoiler tag, but I have to trim out about 25% of it to get it down within the post-size limit. I trimmed out all the non-binary tweets and then many of the oldest ones. Each line is a tweet, oldest on top.
Spoiler:
0110000010101101111101100011001011110111011110010001010111101001110111011011111000010000011001100010000110011111111110001010
1000001101111000111111111110110101010000010101001100001110111000101010110111111000001110110011110001011110100001001111110010
0101010011111011100001111111111010011011010100010010100110100010110110101111000110000010010010100001010110001001110010111001
1101000010010011011010111110110101001101110100110110111100100000000001001000000100101100000110011011010101111100101110101110
0010000001011100001111001101000111000010110110100000001010010111010110011010011111101100110011011110100010100010000110111000
0010011000111000111111100000110111101010110001110011111001101110011001010000011000011100011011010110001001010010110111010000
0001111100110000100111000010010000011001001111001001011000100010010010110001111100011101101110000101011100110100110000001100
0101101101001111001110010001010101111101010000100110011110010110011111000001000001000000001110100011011101111111110011001011
1010110111101100110101111000000011000000001101010011111100111110110001111110111101011010100110011101101111011110100101110101
0110010001011010110010101000101011100011001001011011101101110011100000010110101011011101110111101111101110110001111101000000
0000001001111010100111001010111111111111111010001100011000111110000010000010010000101000101111101011001101110010110011011100
1101100001000101011001010001010101111001100010111011000000100000000111000011110001001110101000100110000111100001110110110101
1100101010101101001110111110011101010111111100110111001001010001000110111101000011001100100101011010000000001001110000111001
1100000000011111010111101010001111111110100011010111111000110110000011101110100001001100010001001000011011110000011100001011
1100010100001010011000011110000010011011110010100001111111000001000001110101010011111001001101011101010111101110111100011100
1111100110100011000111110001000101011100110011000010111010100000110111100110011000111111110101000000110110000101011101011001
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0101111110110110100001010100101001111111110011000101100101100010111111111011011100111100110001111010000001010011010101000110
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1000011101101000100100001110101110001010010110111111101111110110100001000101100001110001001111001000110111011000111000111001
0100011010111100001100010000010011011100011111101101000011101100010101000000100100010001011011111100101011100110000000110011
1110000101011100111101001010001011010000110111011000100101001011101110011010111110101010011100010000001001100101101100111100
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lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

any repetitions? are those tweets all unique?
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

theme
Posts: 9
Joined: Fri Nov 01, 2013 2:05 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

I tried randomly clicking on someone who retweeted @YOUGAKUDAN_00 and found that another user is also tweeting some cryptic messages, this time in decimal at @mrrl_
Anyone wanna decrypt that?

alessandro95
Posts: 109
Joined: Wed Apr 24, 2013 1:33 am UTC

### Re: The enigma of @YOUGAKUDAN_00

Anyone tried to interprete these tweets as japanese characters encoded in GB18030 or some other common encoding for oriental languages?
The primary reason Bourbaki stopped writing books was the realization that Lang was one single person.

SnoringFrog
Posts: 8
Joined: Thu Oct 31, 2013 7:30 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

I haven't been trying to decrypt anything, just logging it for now. I got an IFTTT recipe (https://ifttt.com/recipes/126322) set up that logs each new tweet to this text file; should be easier to parse out what you want from this than working directly with the Twitter account.

https://www.dropbox.com/s/7um2ag2crii5y ... dan_00.txt

(I'll try to remember to come back with links to subsequent files, since IFTTT will create a new one once that file hits 2MB)

ithisa
Posts: 5
Joined: Mon Nov 04, 2013 11:51 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

Just FYI:

I gzipped large blocks of his tweets. All have a compression ratio of 0.177, converging closer to it as the sample size gets larger. I of course reserved a test sample, and that sample compresses to 0.177 too.

I am starting to suspect this is encrypted with some sort of strong encryption, then escaped to ascii (which is already shown by the usage of HTML escape codes when the binary is decoded), then encoded to binary. Good luck guys

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

A string of ascii-characters/bytes that are just 0 or 1 could actually easily be compressed to a factor of 0.125 by switching the bytes to bits. I suspect any random string that is just 0s and 1s will compress to the same ratio.
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

ithisa
Posts: 5
Joined: Mon Nov 04, 2013 11:51 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

Yes, which indicates the tweets of YOUGAKUDAN_00 are either just pseudorandom garbage following a very flat distribution, or encrypted with a strong cipher.

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

If you translate the works of shakespare to binary ascii, than post the 0s and 1s somewhere where they themselves are again encoded in ascii (twitter) and compressed this you would get the same compression rate.
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

ithisa
Posts: 5
Joined: Mon Nov 04, 2013 11:51 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

No, you would not. In fact, the sample size I used was very small, a few tweets. No matter which tweets I select, the compression ratio is exactly 0.177, no matter what gzip level i choose, or even if I use bzip2. Compression ratios of actual text should be not nearly as uniform. This ratio is very strong evidence that this is essentially incompressible data, encoded in a form that has 0.177 bits of information per encoded bit.

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

Do you understand the difference between a byte that represents the character "0" and a bit that has the value 0? If you represent a string of 0s and 1s as bytes that represent the ascii characters "0" and "1" you are using 8 bits to represent every 1 and 0. Since it is just 0s and 1s you are using 8 times as much bits as would be needed. So 87.5% of all bits used in a representation of a string of 1s and 0s in bytes does not add any real information. Whether the actual string of 1s and 0s is made from garbage or the works of shakespeare is irrelevat, you always end up with 87.5% bits that contain no additional information.

Edit: or as you yourself phrased it:
ithisa wrote:encoded in a form that has 0.177 bits of information per encoded bit

Just that one would actually expect only 0.125 bits of information instead of 0.177.
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

jestingrabbit
Factoids are just Datas that haven't grown up yet
Posts: 5967
Joined: Tue Nov 28, 2006 9:50 pm UTC
Location: Sydney

### Re: The enigma of @YOUGAKUDAN_00

lorb wrote:Do you understand the difference between a byte that represents the character "0" and a bit that has the value 0? If you represent a string of 0s and 1s as bytes that represent the ascii characters "0" and "1" you are using 8 bits to represent every 1 and 0. Since it is just 0s and 1s you are using 8 times as much bits as would be needed. So 87.5% of all bits used in a representation of a string of 1s and 0s in bytes does not add any real information. Whether the actual string of 1s and 0s is made from garbage or the works of shakespeare is irrelevat, you always end up with 87.5% bits that contain no additional information.

If the 0s and 1s were as though from a random source, then yes, you would expect compression to 0.125 of the original. If it were the ascii encoding of the ascii encoding of shakespeare, then every 64 bits is encoding a character of English, and because English has only about 1 bit of information per character, I would expect you could zip it down to about 1/64th of the original.

lorb wrote:D
ithisa wrote:encoded in a form that has 0.177 bits of information per encoded bit

Just that one would actually expect only 0.125 bits of information instead of 0.177.

But there's other stuff in the signal. html escape characters, most notably. This would up the information rate.

More generally, this really does seem like the modern analog of the cold war numbers stations, with increased baud to boot.
ameretrifle wrote:Magic space feudalism is therefore a viable idea.

ithisa
Posts: 5
Joined: Mon Nov 04, 2013 11:51 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

Or maybe it is just some terrible inefficiency in gzip. HTML escape codes would dilute the information rate, not increase it.

theme
Posts: 9
Joined: Fri Nov 01, 2013 2:05 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

Anyone knows what yougakudan (the username) means? I think it might be an important clue about how to decrypt this, but I don't know japanese.
BTW anyone interested in decoding http://www.twitter.com/mrrl_? There are some strange decimal numbers there.

Carlington
Posts: 1588
Joined: Sun Mar 22, 2009 8:46 am UTC
Location: Sydney, Australia.

### Re: The enigma of @YOUGAKUDAN_00

Well, in the past ~15 minutes there's been two tweets in Japanese, each with quite a few replies. Taking @YOUGAKUDAN_00's tweets and the replies, in chronological order, Google Translate gives me:
yougakudan: Mail I received willl sent 10 million yen to not even ask, but this guy is ...... where did you send that?
Supame
Mom
The crust will ~Oo Nikki decided to Oira! !
Do not you get this the love of my
Over w and longing to obtain over sky
yougakudan: Is this a new kind of con you mean! ?
It's a present from me!
I wait a little more because I sent in a Yu-pack!
(See on TV) Have you heard of such fraud
I was sent

(One tweet per line, I've marked which ones are ygkdn's tweets.)
A little interpretation tells me that it's a conversation going something like:
ygkdn: "I received mail demanding 10 million yen, no questions asked, but this guy is...how did he know where to send it?!"
"Supame"(?)
"Mom" (presumably, "he asked (his/your) mom")
?
?
ygkdn: "You mean, it's some sort of scam?"
"It's a present from me!"
"Wait a little longer, I sent a Yu-pack(?)"
"(Look at your TV!) Have you ever heard of a con like this [in real life]?"
"I sent it."

...maybe?
Kewangji: Posdy zwei tosdy osdy oady. Bork bork bork, hoppity syphilis bork.

Eebster the Great: What specifically is moving faster than light in these examples?
doogly: Hands waving furiously.

Please use he/him/his pronouns when referring to me.

ithisa
Posts: 5
Joined: Mon Nov 04, 2013 11:51 pm UTC

### Re: The enigma of @YOUGAKUDAN_00

theme wrote:Anyone knows what yougakudan (the username) means? I think it might be an important clue about how to decrypt this, but I don't know japanese.
BTW anyone interested in decoding http://www.twitter.com/mrrl_? There are some strange decimal numbers there.

yougakudan 幺樂団 is something from Touhou games; IDK exactly what it is, seems to be popular on Japanese internetz.

I read Japanese, but not very good, and this guy often uses rather thick Kansai dialect, so, don't trust the following too much (don't trust Google Translate though; statistical methods work pathologically badly in English <-> Japanese, mostly due to the fact that English has very messy syntax but clear low-level (word/phrase-level) semantics, Japanese syntax is almost completely right-associative context-free, and grammar is incredibly regular, but often omitts semantic things deemed obvious (subjects, objects, etc))

(๑╹ω╹)アプリ認証するやつ全部やで アクセストークンで通信するから絶対必要やねん RT @3dslight: アクセストークンの入手って例えばヴェネったーとかのアプリ認証かな

(๑╹ω╹)どっちもやろうと思えばできるよ RT @_bocchan: @YOUGAKUDAN_00 どっちが得意ですか！？

"If you can think that any way would work, I would be able (to do that)! @_bocchan: Are all methods all right?!"

(๑╹ω╹)後者は、ユーザーにアプリ認証させるだけアクセストークンを入手することができるので難易度は低いですが、乗っ取れる範囲は限定されます。

(in more polite language) "The latter method is, you only need to verify the user application and then obtain the account token; I can do that, so it is easy, but the (account?) hijacking scope would be limited."

(๑╹ω╹)前者は、ユーザーからパスワードを聞き出す必要があるため難易度は高いですが、標的のアカウントを完全に乗っ取ることができます。

"The previous method would need you to obtain the password from the user; this is hard, but, you can completely pwn the target account."

Other posts specifically mention pwning Twitter accounts, but too lazy to translate -_-

lorb
Posts: 405
Joined: Wed Nov 10, 2010 10:34 am UTC
Location: Austria

### Re: The enigma of @YOUGAKUDAN_00

jestingrabbit wrote:
lorb wrote:Do you understand the difference between a byte that represents the character "0" and a bit that has the value 0? If you represent a string of 0s and 1s as bytes that represent the ascii characters "0" and "1" you are using 8 bits to represent every 1 and 0. Since it is just 0s and 1s you are using 8 times as much bits as would be needed. So 87.5% of all bits used in a representation of a string of 1s and 0s in bytes does not add any real information. Whether the actual string of 1s and 0s is made from garbage or the works of shakespeare is irrelevat, you always end up with 87.5% bits that contain no additional information.

If the 0s and 1s were as though from a random source, then yes, you would expect compression to 0.125 of the original. If it were the ascii encoding of the ascii encoding of shakespeare, then every 64 bits is encoding a character of English, and because English has only about 1 bit of information per character, I would expect you could zip it down to about 1/64th of the original.

You are right. I kind of overlooked that 1/8 is the compression rate one would expect at least.
Please be gracious in judging my english. (I am not a native speaker/writer.)
http://decodedarfur.org/

shoeboxer
Posts: 1
Joined: Wed Nov 13, 2013 7:19 am UTC

### Re: The enigma of @YOUGAKUDAN_00

This doesn't address the meaning of his binary, but a blog post on some guy's website called "dampfkraft" has some interesting information on @yougakudan_00.

It seems the name is a reference to Touhou project games, which are all in the "bullet hell" genre. @yougakudan_00, who is ~21 years old, started using a program to automatically tweet as much as possible, up until the 1,000 tweets/day limit was imposed. 1 tweet/2.6 seconds seems similar enough to a bullet hell, which leads me to believe that he was just aiming to get the highest tweet count, and get noticed for it. It worked.

Other than that, he's just a kid. Still not sure why so many people follow him, or what the messages mean, if anything.