In collaboration with the Berlin-based start-up XAIN, Porsche is currently testing blockchain applications directly in vehicles—making Porsche the first automobile manufacturer to implement and successfully test blockchain in a car.
Transactions based on this technology are both secure and can be processed far more quickly than anything that has come before. The applications tested include locking and unlocking the vehicle via an app, temporary access authorizations and new business models based on encrypted data logging. This could be developed further, for example, to improve autonomous driving functions.
http://www.greencarcongress.com/2018/02/20180226-porsche.html
https://youtu.be/KvyF78RTj18