Car-sharing, ride-sharing and ride-hailing arenít new. Uber and other personal mobility services have redefined how people move from place to place. And now these services are beginning to redefine traditional car ownership itself. As people move from one vehicle to another, their personal information and preferences need to follow them, so the car they use feels like their own. Blockchain is defined as a shared, immutable ledger, and it can address many of the challenges that new types of personal mobility present.