[Cryptography] Bitcoin theft and the future of cryptocurrencies

[jamesd at echeque.com]

> > Suppose HHitler puts a wallet address on his website, and asks for
> > donations.

On 12/28/2017 4:55 AM, John Tromp wrote:
> Mimblewimble doesn't have public addresses.
> See https://github.com/ignopeverell/grin/blob/master/doc/grin4bitcoiners.md

Unspent amounts, and their associated public key, remain in the 
Mimblewimble blockchain until some time after they are spent, 
potentially forever.

Is the associated public key hidden so that only the true owner of the 
unspent transaction can recognize it?

Obviously HHitler is going to have to advertise his wallet address so 
that he can get paid.

What is the relationship between his wallet address, and what eventually 
appears in the blockchain?

If Ann sends money to HHitler, she not only wants to hide from the 
authorities that she sent an unknown amount of money to HHitler, she 
also wants to be able to prove to HHitler that she sent him money, that 
she sent him a specific amount of money, and be able to prove to 
arbitrary third parties that she sent him a specific amount of money.