Lending a drilling machine



In this scenario, Alice, a homeowner, wants to lend her drilling machine to Bob, a neighbor who needs to perform some home improvement tasks. To ensure transparency and trust, Alice will receive a digital receipt confirming that she has lend the drilling machine from Alice.

What should be achieved?

Transparency and trust between Alice and Bob about the lending of a drilling machine.

What should not happen?

Alice and Bob do not want to make their real identities transparent to others.

The fact that it is a lending process should not be exposed.

The fact that a drilling machine should not be exposed.

How to do this?

For simplicity, both Alice and Bob know the ID of each other from the past. (Hint: You get your ID by clicking on the upper right Icon. It will give your ID and allow you scanning the ID of someone else to see it).

Bob opens https://tydids.com/

Creates a new validation

Using the "+" adds a field named "Fact" with the value "I borrow the drilling machine with serial number 1234"

Bob signs the validation and gets a PDF document that he will give to Alice.

Alice opens the Verifier of Tydids and validates the signatures and gives the drilling machine to Bob.

Important: Do only trust if you trust

Basic rule: "Zero Trust"

The example has a single point where trust is needed: It relies on the past/history knowledge of the IDs (=consensus).  But what if this does not exist? What if Bob just moved to the new house? A technical answer to this is "strong qualified signatures".