$BTC

Bitcoin (BTC) relies on cryptography to secure transactions, control new coin issuance, and verify transfers across its decentralized network. The cryptographic foundation of Bitcoin is based on public-key cryptography (PKC). Each user has a pair of keys: a public key, visible to others, and a private key, kept secret. The private key signs transactions, proving ownership, while the public key verifies the signature's authenticity. Bitcoin also uses hashing algorithms, specifically SHA-256, to create secure and immutable transaction records within its blockchain. These hashes link blocks of transactions, ensuring data integrity and preventing tampering. This robust cryptographic system underpins Bitcoin's security and trustless architecture.

btc is a future payment system also