Are there private blockchains?

In a public blockchain, anyone is free to join and participate in the core activities of the blockchain network. A private blockchain allows only selected entry of verified participants ; the operator has the rights to override, edit, or delete the necessary entries on the blockchain.

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How is blockchain used today?

Blockchain provides a way to securely and efficiently create a tamper-proof log of sensitive activity . This makes it excellent for international payments and money transfers. … Blockchain technology can be used to decrease the cost of these transfers by reducing the need for banks to manually settle transactions.

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