Print Page - embedded ascii in the blockchain

Title: embedded ascii in the blockchain
Post by: koin on August 01, 2011, 06:53:16 AM

http://news.ycombinator.com/item?id=2830084

Quote

Dan Kaminsky figured out a way to embed ascii text into the block chain. I did not try to find out how he did it, but he probably created some transactions that include those strings. If you want to find out more about how he did it, he will give a talk at the Chaois Communications Camp related to Bitcoin.

is there already discussion about this here?

fortunately with most mining done on pools and this being something not in the pool owner's best interest, the frequency of it occuring further should be low. but how will this be solved?

Title: Re: embedded ascii in the blockchain
Post by: JoelKatz on August 01, 2011, 07:23:07 AM

Does anyone know which block the ASCII is in?

Title: Re: embedded ascii in the blockchain
Post by: theymos on August 01, 2011, 07:24:40 AM

This has been known forever. It's not a problem: the block chain stores whatever data and charges the same fee per kB.

Title: Re: embedded ascii in the blockchain
Post by: Stephen Gornick on August 05, 2011, 12:48:29 AM

Dan addresses this himself here:
- http://bitcointalk.org/index.php?topic=34458.0

Title: Re: embedded ascii in the blockchain
Post by: jackjack on August 05, 2011, 01:03:51 AM

Quote from: JoelKatz on August 01, 2011, 07:23:07 AM

Does anyone know which block the ASCII is in?

http://blockexplorer.com/tx/930a2114cdaa86e1fac46d15c74e81c09eee1d4150ff9d48e76cb0697d8e1d72

Title: Re: embedded ascii in the blockchain
Post by: JoelKatz on August 05, 2011, 01:15:05 AM

Thanks, jackjack.

Title: Re: embedded ascii in the blockchain
Post by: etotheipi on August 05, 2011, 03:43:57 AM

So is there actual information in those TxOuts? Or was he just destroying coins for fun? It looks like gibberish to me...

Title: Re: embedded ascii in the blockchain
Post by: Tasty Champa on August 05, 2011, 03:52:48 AM

running this:

Code:

strings -n 20 ~/.bitcoin/blk0001.dat

gets you this:

Code:

EThe Times 03/Jan/2009 Chancellor on brink of second bailout for banks
z+o>z+o>z+o>z+o>z+o>
z+o>z+o>z+o>z+o>z+o>
z+o>z+o>z+o>z+o>z+o>
z+o>z+o>z+o>z+o>z+o>
z+o>z+o>z+o>z+o>z+o>
z+o>z+o>z+o>z+o>z+o>
=ybegin line=128 siz
e=8776 name=bitcoin.
***2*.+D*/***+***h+E
*/***+***p+R*-***+*,
**+[*,***;***x******
0010/211133246>76556
C<=}9>GDIHGDFFJNXQJL
VMFFRaSVZ[^^^IQcgb\f
KFK\\\\\\\\\\\\\\\\\
\\\\\\\\\\\\\\\\\\\\
+/++++++********+,-.
DPQRST_`abcdmnopqrst
*>{o*>{o*>{o*>{o*>{o
---BEGIN TRIBUTE--- 
#./BitLen           
::::::::::::::::::: 
:::::::.::.::.:.::: 
:.: :.' ' ' ' ' : : 
:.:'' ,,xiW,"4x, '' 
:  ,dWWWXXXXi,4WX,  
' dWWWXXX7"     `X, 
 lWWWXX7   __   _ X 
:WWWXX7 ,xXX7' "^^X 
lWWWX7, _.+,, _.+., 
:WWW7,. `^"-" ,^-'  
 WW",X:        X,   
 "7^^Xl.    _(_x7'  
 l ( :X:       __ _ 
 `. " XX  ,xxWWWWX7 
  )X- "" 4X" .___.  
,W X     :Xi  _,,_  
WW X      4XiyXWWXd 
"" ,,      4XWWWWXX 
, R7X,       "^447^ 
R, "4RXk,      _, , 
TWk  "4RXXi,   X',x 
lTWk,  "4RRR7' 4 XH 
:lWWWk,  ^"     `4  
::TTXWWi,_  Xll :.. 
=-=-=-=-=-=-=-=-=-= 
LEN "rabbi" SASSAMA 
     1980-2011      
Len was our friend. 
A brilliant mind,   
a kind soul, and    
a devious schemer;  
husband to Meredith 
brother to Calvin,  
son to Jim and      
Dana Hartshorn,     
coauthor and        
cofounder and       
Shmoo and so much   
more.  We dedicate  
this silly hack to  
Len, who would have 
found it absolutely 
hilarious.          
--Dan Kaminsky,     
Travis Goodspeed    
P.S.  My apologies, 
BitCoin people.  He 
also would have     
LOL'd at BitCoin's  
new dependency upon 
   ASCII BERNANKE   
:'::.:::::.:::.::.: 
: :.: ' ' ' ' : :': 
:.:     _.__    '.: 
:   _,^"   "^x,   : 
'  x7'        `4,   
 XX7            4XX 
 XX              XX 
 Xl ,xxx,   ,xxx,XX 
( ' _,+o, | ,o+,"   
 4   "-^' X "^-'" 7 
 l,     ( ))     ,X 
 :Xx,_ ,xXXXxx,_,XX 
  4XXiX'-___-`XXXX' 
   4XXi,_   _iXX7'  
  , `4XXXXXXXXX^ _, 
  Xx,  ""^^^XX7,xX  
W,"4WWx,_ _,XxWWX7' 
Xwi, "4WW7""4WW7',W 
TXXWw, ^7 Xk 47 ,WH 
:TXXXWw,_ "), ,wWT: 
::TTXXWWW lXl WWT:  
----END TRIBUTE----

you have to have the full blockchain for it to output, completely.

Title: Re: embedded ascii in the blockchain
Post by: Tasty Champa on August 05, 2011, 04:01:10 AM

I remember reading in a resurrected thread about how someone could also put a file in it.

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Bitcoin => Development & Technical Discussion => Topic started by: koin on August 01, 2011, 06:53:16 AM