Now consider the following potential barriers to using a private blockchain:
- Confidentiality: As explained earlier, nodes that are participating in the consensus process can independently verify and process every transaction. This is possible because these nodes have full visibility of the current state of the database, all modifications (requested by transactions), and the digital signature that proves the origin of a transaction. This full transparency for each node can be a deal breaker for certain applications (for example, financial applications). Like private blockchains, standard databases restrict the queries that a user can perform, but these restrictions are only imposed at one central location, and the full database ...
