Some technical block chain technology involved are: cryptography, P2P, Internet transport protocols, databases, distributed, Principles of Economics, etc., block chain technology is a distributed accounting techniques (data is difficult to be tampered with), we can be understood as a distributed database (since each node need to synchronize the data, because the data update is relatively slow, there are also some technology can increase the speed of synchronization, like off-chain (side chain technology) lightning network project, fragmentation technology, etc.)
Chain on the public, private chain, Union chain, wherein the node can be understood:
Public chain consists of many multi-node number; private chains will be appreciated that more than a single controllable node, commonly used as a test; alliance agreement by a chain It recognized by the League of multiple nodes form.
The main scenarios are:
1, pay + digital currency
2, shared economic + credit value transfer (consensus incentives)
3, do the right traceability function (copyright, supply chain tracking)
4, crowdfunding (legal limit)
5, to the center group management, token to redefine equity
6, programmable society (intelligent custom contract)
What about the hash that?