The only buyer protection that maintains all benefits of cryptocurrencies

Have you ever paid with a cryptocurrency but never received the goods?
The paper of Bitcoin already mentioned the need of a third party – a trustee – to provide buyer protection. Buyer and seller would have to trust this third party that decides what happens with the payment in case of problems.
We present a new decentralized crypto technology that binds vendors to their offered goods despite anonymity or national borders. In contrast to previous approaches, this happens without involving any third parties whereby online trading can be trusted again.