The second function of the private key is as a digital signature for transactions. Its called a private key because it is meant to be kept private and not shown to other people. Private Keys Public Keys Addresses And Wallets Coinsource The World S Leader In Bitcoin Atms The Most Trusted Bitcoin Atm Network A private key grants access to funds. How does bitcoin private keys work . A private key is always mathematically related to the bitcoin wallet address but is impossible to reverse engineer thanks to a strong encryption code base. It also details the differences between various private key formats such as hexadecimal wallet import format WIF and compressed wallet import format compressed WIF. If it is your Bitcoin it will be your private key that is written on it. Each transaction in the block has a public key written on it. Wallets in cryptocurrency work in a weird way. A Bitcoin private key is an unimaginably large number that is kept secret and used to access BTC when...