The objective of this work is to do a briefing about the digital currency named Bitcoins, as well as the general concept behind digital currencies and cryptocurrencies. Such currencies usage and public knowledge is increasing hastily on the last few months.   The objective of this work is to do a briefing about the digital currency named Bitcoins, as well as   the general concept behind digital currencies and cryptocurrencies. Such currencies usage and public knowledge   is increasing hastily on the last few months.