<p>While working on my master thesis I used the <a href="http://en.wikipedia.org/wiki/AACS_encryption_key_controversy">AACS encryption key</a> (09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0), considered an <a href="http://en.wikipedia.org/wiki/Illegal_number">illegal number</a>, as a basis for creating a fake Bitcoin address - <a href="http://blockexplorer.com/address/1ujTAfEQh2obwdt72GrmXonakx2RxvYpX">1ujTAfEQh2obwdt72GrmXonakx2RxvYpX</a>. A 1 Satoshi transaction was sent to that address from address 17TQLZvXjKTrUyRnV9DuQs4RVDgNjUPeXQ. The <a href="http://blockexplorer.com/tx/6ceb2859747dc78d6e54a35cf6b49ec8530993a864a5325cb838a765dd023618#o1">transaction</a> was encoded in <a href="http://blockexplorer.com/block/00000000000006c6076ba8b5078f6f4aafb1b55e03eddfbe2c488bc26cc723e8">block 177653</a>.</p>

CC BY-SA 3.0
2013-02-06T03:33:46.673Z
Wouldn't it be easier to just have the hex string 09f911029d74e35bd84156c5635688c0 be the private exponent? That makes the unused address 1KyKqNh9fM5sN8uWDLXNv2o52sqj94GhbN. (Generated using brainwallet.org)
lurf jurv
CC BY-SA 3.0
2013-02-06T05:54:12.163Z
@lurfjurv But then you are not storing the illegal number, but some derivation of it which is technically not illegal.
ThePiachu
CC BY-SA 3.0
2013-02-08T16:07:16.360Z
Oh. How does 1ujTAfEQh2obwdt72GrmXonakx2RxvYpX represent that number, then?
lurf jurv
CC BY-SA 3.0
2013-02-09T08:54:33.840Z
@lurfjurv It's hash160 (as in, hex version of the address that is a part of the block now) is 09f911029d74e35bd84156c5635688c000000000 .
ThePiachu
CC BY-SA 3.0
2012-04-29T23:52:39.593Z
2012-04-29T23:52:39.593Z
ThePiachu
<p>Has any <a href="https://en.bitcoin.it/wiki/Weaknesses#Illegal_content_in_the_block_chain">illegal data</a> been saved in the Block Chain, such as an <a href="http://en.wikipedia.org/wiki/Illegal_number">illegal number</a>, or <a href="http://en.wikipedia.org/wiki/Illegal_prime">illegal prime</a>?</p>

CC BY-SA 3.0
2012-04-19T00:35:38.917Z
While seeing the Bernank's face in there is repulsive, I don't think it is criminal.  http://pastebin.com/raw.php?i=BUB3dygQ
Stephen Gornick
<blockchain><legal><block>
Has any illegal data been saved in the Block Chain?
ThePiachu
# Has any illegal data been saved in the Block Chain?

(Asked by: username_0 on 2012-04-19)

Has any [illegal data](https://en.bitcoin.it/wiki/Weaknesses#Illegal_content_in_the_block_chain) been saved in the Block Chain, such as an [illegal number](http://en.wikipedia.org/wiki/Illegal_number), or [illegal prime](http://en.wikipedia.org/wiki/Illegal_prime)?

**Tags:** blockchain, legal, block

> **Comments:**
> **username_1**: While seeing the Bernank's face in there is repulsive, I don't think it is criminal.  http://pastebin.com/raw.php?i=BUB3dygQ  

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## 1 answers

### Answer by username_0 on 2012-04-29. Score: 12 | Accepted answer

While working on my master thesis I used the [AACS encryption key](http://en.wikipedia.org/wiki/AACS_encryption_key_controversy) (09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0), considered an [illegal number](http://en.wikipedia.org/wiki/Illegal_number), as a basis for creating a fake Bitcoin address - [1ujTAfEQh2obwdt72GrmXonakx2RxvYpX](http://blockexplorer.com/address/1ujTAfEQh2obwdt72GrmXonakx2RxvYpX). A 1 Satoshi transaction was sent to that address from address 17TQLZvXjKTrUyRnV9DuQs4RVDgNjUPeXQ. The [transaction](http://blockexplorer.com/tx/6ceb2859747dc78d6e54a35cf6b49ec8530993a864a5325cb838a765dd023618#o1) was encoded in [block 177653](http://blockexplorer.com/block/00000000000006c6076ba8b5078f6f4aafb1b55e03eddfbe2c488bc26cc723e8).

> **Comments:**
> **username_2**: Wouldn't it be easier to just have the hex string 09f911029d74e35bd84156c5635688c0 be the private exponent? That makes the unused address 1KyKqNh9fM5sN8uWDLXNv2o52sqj94GhbN. (Generated using brainwallet.org)  
> **username_0**: @username_2 But then you are not storing the illegal number, but some derivation of it which is technically not illegal.  
> **username_2**: Oh. How does 1ujTAfEQh2obwdt72GrmXonakx2RxvYpX represent that number, then?  
> **username_0**: @username_2 It's hash160 (as in, hex version of the address that is a part of the block now) is 09f911029d74e35bd84156c5635688c000000000 .  

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