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The crypto-currencies like Bitcoin attract more and more interest, thanks to their unique technology called Blockchain. Simply select a service, register, and then purchase the virtual currencies you want. You will then be able to manage your investments independently. You must first go to a Bitcoin merchant that will exchange your euros for Bitcoins or other crypto-currencies. Most of the time, the purchase is done by PayPal, credit card (instantly) or by bank transfer (24 / 72h).
Mining is a distributed consensus system used to confirm pending transactions by including them in the block chain. In this way, no individual can control what is included in the block chain or replace parts of the block chain to withdraw their own transactions. With Bitcoin merchant you can process and issue invoices yourself or you can use the services of a trader and receive directly you country value or Bitcoins. These rules prevent previous blocks from being modified because this would invalidate all subsequent blocks. Mining also prevents a case where an individual can easily add new blocks sequentially in the block chain. To be confirmed, transactions must be included in a block that complies with very strict cryptographic rules to be verified by the Bitcoin network. Mining imposes a chronological order in the block of blocks, protects network neutrality, and also allows different computers in the network to agree on the condition of the system. Most stores and outlets use a tablet or mobile phone to allow customers to pay through wallets on their mobile phones.
Any person participating in the Bitcoin network has a wallet containing an arbitrary number of cryptographic key pairs. Public keys or Bitcoin addresses function as the endpoint for receiving all payments. Creating one-time addresses helps maintain user anonymity. Manually-readable addresses are random 33-character long numbers and letters, always starting with 1, eg 175tWpb8K1S7NmH4Zx6rewF9WQrcZv245W. Addresses contain no information about their holder are generally anonymous. Bitcoin users can hold multiple addresses, and can actually generate new addresses without any practical limits, because generating a new address requires relatively little computational power, equivalent to generating a pair of public / private keys, and requires no contact with any node in the network.
Bitcoin merchant payments would be a massive solution to problems of KYC, contracts and currency conversion for international payments specially. If a company needs to get paid anywhere in the world, it is a rather difficult process because depending on the size of the market and the strength of the currency in question, businesses lose millions of dollars in fees and conversion unnecessarily. Contract would be in the blockchain eliminating laborious checks and mailing and the money would not take days to be compensated back to the home country account: it would be available instantly which reduces risk and the need for factoring. With Bitcoin merchant payments adoption, KYC would be minimized because all of the process would be as simple as accessing a blockchain based KYC system that is tied to a company owned IBAN.
The integrity and chronological order of the block of chains are empowered by cryptography. All confirmed transactions are included in the block chain. The principles of the system are described in Satoshi Nakamoto's 2008 report. Bitcoin uses the SHA-256 algorithm as a proof-of-work protocol. In this way, Bitcoin wallets can calculate the balances that can be spent and new transactions can be checked to involve Bitcoins that are actually held by the payer. The block chain is a common public register on which the entire Bitcoin network is based.