In Bitcoin transactions, public and private keys are used to provide security and authenticity. The public key is like an account number, which is shared with others to receive Bitcoin. The private key is like a password, which is kept secret and is used to sign transactions and prove ownership of the funds. When someone sends Bitcoin to a user, they use the recipient's public key to create a transaction, and the recipient uses their private key to authorize the transaction and claim the funds. This_
