[cryptography] Bitcoin observation

Marsh Ray marsh at extendedsubset.com
Tue Jul 5 22:16:12 EDT 2011


On 07/05/2011 08:07 PM, Taral wrote:
> On Tue, Jul 5, 2011 at 3:53 AM, Adam Back<adam at cypherspace.org>  wrote:
>> I dont think you can prove you have destroyed a bitcoin, neither your own
>> bitcoin, nor someone else's.  To destroy it you would have to prove you
>> deleted the coin private key, and you could always have an offline backup.
>
> Actually, it's pretty easy to create a transaction whose outputs are
> obviously unsatisfiable.

So this suggests the attacker who pwned Mt. Gox was probably doing it 
"for the lulz" as they say. (Or maybe they didn't know about this property).

Next time they might just take all the bitcoins held in escrow by the 
exchange and transfer them to /dev/null.

- Marsh



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