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The more basic article on Bitcoin Addresses may be more appropriate. A Bitcoin address is a 160-bit hash of the public portion of a public/private ECDSA keypair. Using public-key cryptography, you can sign data with your private key and anyone who knows your public key can verify that the signature is valid.
A Bitcoin is a digital token â with no physical backing â that can be sent electronically from one user to another, anywhere in the world. A Bitcoin can be divided out to eight decimal places, so you can send someone 0.00000001 Bitcoins. This smallest fraction of a Bitcoin â the penny of the Bitcoin world â is referred to as a Satoshi, after the anonymous creator of Bitcoin.