A private blockchain is a type of blockchain that is restricted to a specific group of users. Unlike public blockchains, which are open to anyone, private blockchains require permission to access and participate in the network.These blockchains are often used by organizations for internal purposes. Their controlled environment allows for faster transactions and greater privacy, as sensitive information can be shielded from outside parties. In a private blockchain, network participants typically validate transactions through a consensus mechanism that may differ from the open processes found in public chains. This can lead to more efficient operations and reduced energy consumption.Private blockchains are suitable for enterprises that need to collaborate securely while maintaining control over their data. They can be customized to fit the needs of the organization, making them a practical solution for businesses looking to leverage blockchain technology without exposing their data to the public.