Indeed, a capability is like a smart key. But it's more flexible than that; capabilities can run arbitrary code, like a smart card. And since capabilities can m

Indeed, a capability is like a smart key. But it's more flexible than that; capabilities can run arbitrary code, like a smart card. And since capabilities can manage references to other capabilities, really a capability is like a smart executable contract. This is precisely where "smart contract" comes from. I should probably write a blog post about this.