Existing smart city concepts include within themselves a variety of equipment with sensors for collecting data. This could be driverless transportation, drones for the delivery of goods, city cameras for monitoring, automated stoplights, and any other equipment for that matter. This makes the collection of personal data an inevitable fact, which is why it is necessary to prevent this data from being accessed by unwanted third parties.
The collection and storage of personal data create a risk for the personal lives of every human being. Developers of solutions for smart cities must provide a transparency policy for the exchange, confidentiality, and security of data for end-users.
This is exactly why blockchain technology opens up the possibility for all participants of such a process to collect and exchange their data with a high level of reliability and security without the involvement of a sole centralized administrator or intermediaries.