$BTC
Cryptography is used to secure financial data: that is why many people refer to cryptocurrencies simply as "crypto." Cryptography is a technique used to secure information and communications, and for this purpose, public key encryption is used. In digital currency, the public key can be shared with others to send digital currency. When investors buy a digital asset, they also possess a private key that cannot be shared with anyone. The private key is like a password that protects cryptocurrency assets and is used to sign transactions you initiate with other parties or to recover cryptocurrency wallets from faulty devices.
