Security if data and of presence with any smart city must be paramount, from the way the internet is piped about the city to the way citizens and objects connect.
blockchain is considered more secure and resistant to alterations. Integrating blockchain into smart cities could better connect all of the city services while boosting security and transparency.
Blockchain is expected to influence cities is through smart contracts, which help with billing, processing transactions and handling facilities management. Smart contracts are self-executing contracts with the terms of the agreement between buyer and seller directly written into lines of code. They permit trusted transactions and agreements to be carried out among disparate parties without the need for a mediating third party, making the process safer, cheaper and faster."
Block chain has been offered as a viable way to achieve this, the following papers explore this: