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Blackcoin is a cryptocurrency simillar to Bitcoin but with differences. It use Proof-of-Stake system instead of Proof-of-Work. Proof-of-stake (PoS) is a type of algorithm by which a cryptocurrency blockchain network aims to achieve distributed consensus. Unlike proof-of-work (PoW) based cryptocurrencies (such as bitcoin), where the algorithm rewards participants who solve complicated cryptographical puzzles in order to validate transactions and create new blocks (i.e. mining), in PoS-based cryptocurrencies the creator of the next block is chosen in a deterministic (pseudo-random) way, and the chance that an account is chosen depends on its wealth (i.e. the stake). In PoS cryptocurrencies the blocks are usually said to be forged (in the blacksmith sense of this word), or minted, rather than mined.
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