This doesn't work in reality. If you have two companies that need to work with common data it's currently very complex and costly to ensure that both parties ca

This doesn't work in reality. If you have two companies that need to work with common data it's currently very complex and costly to ensure that both parties can trust the data. That's why trust banks are so big in finance (e.g. Bank of New York, State Street) because it's often cheaper to have a third party you can trust rather than establishing protocols between two companies that auditors approve. Blockchain can save a lot of money here by making the trusted third party obsolete.