Can you expand on this point please: since blockchain.info is now offering two mixing services, if Shared Coin can not guarantee 0% taint but Send Shared can, why would anyone choose to use Shared Coin rather than Send Shared? Thanks.
Shared Coin- "Trustless mixer"
- Free
- Quick (30 seconds)
- Coins never leave your control so requires less trust in the operator.
- Service not hosted by blockchain.info.
- Design to be used to everyday for the majority of your bitcoin transactions.
Shared Send- "Traditional mixer"
- 0.5% Fee
- Can be slow sometimes
- Coins sent to the operator, trust is then required that the operator will actually send the coins back.
- 0% taint
Trustless mixers are the future of bitcoin mixing but arguably at the moment provide weaker anonymity. However the techniques are still new and there is much room for improvement (P2P, Coinswap). So in time Shared Send will likely be depreciated in favour of Shared Coin but it is not quite ready yet (they do not have to be mutually exclusive, use both if you want).