satoshi nakamoto wrote:

"The necessity to announce all transactions publicly

precludes this method, but privacy can still be maintained by breaking the flow of information in

another place: by keeping public keys anonymous. The public can see that someone is sending

an amount to someone else, but without information linking the transaction to anyone. This is

similar to the level of information released by stock exchanges, where the time and size of

individual trades, the "tape", is made public, but without telling who the parties were."

this has nothing to do with bitcoin.

it describes what monero does.