Blockchain: Perspectives and issues

The tamper-proof digital database on which are written all exchanges between its users since its inception is named Blockchain. The blockchain is a system of storage distributed on a peer-to-peer network (p2p) using consensus mechanism, asymmetric encryption, smart contracts and other key technologies. In an untrusted environment, blockchain comes to associate the implementation of a mechanism for the exchange of information, transfer of value intended to ensure consistency, and integrity data is the cornerstone of the creation of value future of the Internet. Blockchain technology has the following features: decentralized, safe, reliable, open and transparent. Its characteristics make the most attractive blockchain and is the subject of all the debates at the safe level. File storage, healthcare, banking, insurance, field and other scenarios are widely used. However, the technology of the blockchain is still some problems, such as the low flow of transactions, easy disclosure of user information, the confidentiality of the data of transactions and the safe limits of algorithms encryption. His problems that must be resolved urgently in its development and its application. As an emerging technology, the blockchain still has plenty other still undiscovered problems, but it has broad prospects of development and should allow the creation of a new decentralized era and a new world of Central governance without organ of management.