Private blockchain is used and managed by vietnam phone number sample private companies, who only allow access to the data on the chain with prior authorization. Only users with the appropriate permissions can access specific sets of data. It is usually smaller than a public blockchain and generally only covers one chain. This allows for more precise control of the information on the chain. Due to the small number of users, the network is not overloaded, resulting in lower transaction costs, although at the expense of security. Centralization means that only the companies that manage the chain have access to it, making them vulnerable to potential hacker attacks.
Hybrid blockchain combines features of private and public blockchains. As a result, it features the level of data security characteristic of public blockchains and the low transaction costs typical of private ones. The main problem is the poor visibility of the chain due to privacy, as well as the lack of full control of the chain by the managing company.
Blockchain Federation (consortium) allows control of individual nodes. Data such as date and ID number can be shared between different chains, each of which is under control, and the contents are sent encrypted. This maintains privacy, the security characteristic of a public chain, and the ability to keep a record of transactions.