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    A transaction is a transfer of value between Bitcoin wallets that gets included in the block chain. Bitcoin wallets keep a secret piece of data called a private key or seed, which is used to sign transactions, providing a mathematical proof that they have come from the owner of the wallet. The signature also prevents the transaction from being altered by anybody once it has been issued. All transactions are broadcast between users and usually begin to be confirmed by the network in the following 10 minutes, through a process called mining.

    An unprecedented level of security is possible with Bitcoin. The network provides users with protection against most prevalent frauds like chargebacks or unwanted charges, and bitcoins are impossible to counterfeit. Users can backup or encrypt their wallet and hardware wallets could make it very difficult to steal or lose money in the future. Bitcoin is designed to allow its users to have complete control over their money.

    All payments in the world can be fully interoperable. Bitcoin allows any bank, business or individual to securely send and receive payments anywhere at any time, with or without a bank account. Bitcoin is available in a large number of countries that still remain out of reach for most payment systems due to their own limitations. Bitcoin increases global access to commerce and it can help international trades to flourish.

    With the use of cryptography, secure payments are possible without slow and costly middlemen. A Bitcoin transaction can be much cheaper than its alternatives and be completed in a short time. This means Bitcoin holds some potential to become a common way to transfer any currency in the future. Bitcoin could also play a role inreducing poverty in many countries by cutting high transaction fees on workers' salary.

    Bitcoin can process payments to the scale of a dollar and soon even much smaller amounts. Such payments are routine even today. Imagine listening to Internet radio paid by the second, viewing web pages with a small tip for each ad not shown, or buying bandwidth from a WiFi hotspot by the kilobyte. Bitcoin is efficient enough to make all of these ideas possible. Learn more about the technology behind Bitcoin micro payments.

    Multiple signatures allow a transaction to be accepted by the network only if a certain number of a defined group of persons agree to sign the transaction. This could be used by a board of directors to prevent any member to spend parts of their treasury without other members' consent. This can also be used by banks to prevent theft by blocking payments above a threshold if the user does not provide additional credentials.

     

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