You could use multisig transactions so that you don't put your trust centrally in one third party service, for example you could trust three independent service

You could use multisig transactions so that you don't put your trust centrally in one third party service, for example you could trust three independent services to each hold a private key, that way 2/3 would have to be compromised at the same time in order to for something bad to happen. For more robust security you could add services and need 3/5, 6/10, etc. I'm not sure of the exact implementation details, but in theory I think that would be one solution. > https://en.bitcoin.it/wiki/Contracts#Theory https://en.bitcoin.it/wiki/Contracts#Theory