A type of blockchain mainly used by enterprises where access to it is restricted to only employees or invited guest users. The network owner can do whatever it wants to the data on the blockchain, including editing or deleting it. Private blockchains still use cryptography to secure the blockchain, but they're less focused on identity protection and transparency, as the blockchain already controls who has access to it
Example
“A global bank deploys a private blockchain for interbank settlements, restricting access to approved financial institutions to ensure regulatory compliance while speeding up cross-border transfers.”