adresse
A Bitcoin address is a string of letters and numbers that identifies where bitcoin can be sent. Generated from a public key via cryptographic hashing, it works like a bank account number on the Bitcoin network.
A Bitcoin address is an identifier on the blockchain that represents a destination for funds. Addresses are derived from a public key through two rounds of cryptographic hashing, first SHA-256 and then RIPEMD-160, and encoded in a human-readable format. Three formats are in common use: legacy addresses beginning with 1 (P2PKH), script addresses beginning with 3 (P2SH), and native SegWit addresses beginning with bc1q (Bech32). All formats are valid on the Bitcoin network and wallets handle conversion automatically.
An address is safe to share publicly. Knowing someone's address does not grant access to their funds. Only the corresponding private key can authorize a spend. The mathematical relationship between a private key, public key, and address is one-way: you can derive an address from a key, but you cannot reverse-engineer a key from an address.
Using a fresh address for each transaction is good practice. Because all transactions are permanently visible on the blockchain, reusing an address makes it straightforward to trace your payment history. Most modern wallets generate a new address automatically each time one has been used, while keeping older addresses functional for receiving.