**#Bitcoin #blockchain.transactions
A transaction is a transfer of Bitcoin value on the blockchain. In very simple terms, a transaction is when participant A gives a designated amount of Bitcoin they own to participant B. Transactions are created through wallets: either on mobile, desktop or specialized hardware.
For Bitcoin users, sending a transaction is as simple as entering an amount and an address in their wallet and pressing send. They donât have to worry about the technicalities of how it works. Many users are curious how it works in practice though.
Bitcoin makes use of public-key cryptography to ensure the integrity of transactions created on the network. In order to transfer bitcoin, each participant has pairs of public keys and private keys that control pieces of bitcoin they own. A public key is a series of letters and numbers that a user must share in order to receive funds. In contrast, a private key must be kept secret as it authorizes the spending of any funds received by the associated public key.
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