Most work on the notion of trust online has been about identity verification. In order to do a transaction with my online banking system, I have to verify to that system who I am (and vice versa, just about).
This is not the only trust model out there in the bricks-and-mortar world. Another model is that of a security deposit. If I, for example, hire a bicycle, then I lend the company something of value to me (e.g. a sum of money, a key) that I get back when I return the bicycle.
Could this be implemented online in some way for some applications? Are there any other ways of splitting apart the usually-conflated concepts of trust and identity-verification?