Today's society in the rapidly developing every day, network and technological advancements in the life-changing innovation all the time around us. Change the world every day with each passing day, into 2019, the pace of technological innovation network is the subversion of our existing knowledge. This year, in order to encrypt currency Bitcoin, led by high innovation, but also other more and more people are concerned about the status of network application block chain technology.
Bitcoin digital encryption and other strong currencies to rise in the market, although there is speculation in the market of this industry, but also means the continuous development of the industrial chain block, block chain technology is gradually applied from academia to industry in. In August, the central file support is the emergence of digital money to carry out research and Shenzhen mobile payment and other innovative applications on the block chain digital currency is accepted by the general public in practical applications.
According to PricewaterhouseCoopers and Swiss "encryption Valley" released a report: February 2019, the total value of digital assets block chain to reach its lowest point since the past 21 months, and then began to rise steadily in March. 
After entering the second quarter of 2019, Bitcoin prices suddenly rose rapidly. At the same time, market dominance bitcoin (bitcoin currency market value share of the total market value of the entire encryption) also began rising, now more than 62%. Bitcoin prices only a short period of three months, it soared from $ 3,000 to nearly $ 14,000 more than the entire market capitalization of encryption currency soared from $ 144 billion to about $ 340 billion currently.
Today the network is undoubtedly the most popular block chain and digital currency, and since Facebook launched its own encrypted digital currency project Libra, more and more people to use technology continues to block chain understanding, and even many countries and institutions I began to try a variety of applications using the network block chain technology.
The first half of 2019, related to the start-up block chain received a total of 279 pen financing, financing amounted to $ 822 million. Analysts also observed that the first half of 2019, "IEO" as a new rise of the financing. CoolBitX block chain security company CEO Michael ou commented: "The second quarter of 2019, we saw a truly remarkable development in the block chain industry, suggesting that access to wider global impact of road is becoming more clearly. at the same time, the overall trend has unfolded currency encryption strength and development space for digital assets, while Facebook's Libra in the industry may impact and JP Morgan Chase announced earlier this year JPM.Coin to compete, it also reflects global enthusiasm for the new block chain applications, as well as consumers and businesses huge interest in the benefits of the new technology can bring. " " 
block chain "is called" Peer-to-Peer Encrypted Non -Tampered Database " that "point to point encryption of the database can not be tampered with." It is a database schema, it also increased the technical level of the database itself, considering how to ensure the reliability of the data, and how the database service is not off the assembly line. Therefore, you can not take it with a database of common analogy used to have a name, even, when you can one achieve concrete block chain, use a different database to help store and retrieve data.
Block chain in the end what the charm to attract the attention of so many people? First, let's understand the characteristics of the next block chain technology.
1、数据间的关联和加密化
区块链中一条数据和另外一条数据是关联存在的联系，即使在现实的业务逻辑上没有联系，但是它总是存在于链上，无法脱离链而存在，总有一条路径从一个数据出发到达另外一个数据。
“区块”表达了区块链里面数据关系的最终呈现形式，一条记录，无论它是什么信息，最终它（或它的检索信息）都要被放置在一个区块中。而区块与区块之间，是一个“链表”的数据关系，会编程的人都知道什么是链表，就是后一个数据中存在指向前一个数据的索引键。因此，区块链上的任何两个数据永远可以通过这些索引键最终连在一起。
区块链真正的价值在于，区块链用密码学的原理，现有的加密技术，把这些索引关系进行了层层加密，以至于在保存的数据中，这些索引键并没有那么明显，而是需要通过各种计算才能得到。比如区块在保存一堆交易信息时，采用了merkle树的方式进行保存，父节点是两个子节点的double hash得到的结果，而merkle算法确保了交易信息不能被篡改。
2、数据不可篡改
区块链通过加密校验，通常需要经过严格的验证才能对数据存取，而这验证几乎不可能被伪造的，所以也很难篡改。然而我们所说的加密并不代表不可篡改，但不可篡改是通过加密以及经济学原理搭配实现的。
区块链网络有一个同步逻辑，整个区块链网络总是保持所有节点使用最长的链，那么你修改完之后，一联网同步，修改的东西又会被覆盖。这是不可篡改的一个方面。
而区块链还有个更有意思的操作就是挖矿。挖矿过程其实是矿工争取创建一个区块的过程，一旦挖到矿，也就代表这个矿工有资格创建新区块。怎么算挖到矿呢？通过一系列复杂的加密算法，从0开始到∞，找到一个满足难度的hash值，得到这个值，就是挖到矿。这个算法过程被称为“共识机制”，也就是通过什么形式来决定谁拥有记账权，共识机制有很多种，区块链采用哪种共识机制最佳，完全是由区块链的实际目的结合经济学道理来选择。
3、点对点网络关联让数据永不下线
区块链技术的设计是点对点的网络（客户端和客户端直接通信，不经过某一台特定的服务器）到区块链里面。简单说就是在这个点对点网络里面，所有人的电脑里保管着一模一样的一个数据结构（其实就是一个完整的“区块”“链”），他们相互通过网络连接，进行同步，当矿工创建了新的区块，其他人就会把这个区块同步到自己保管的数据结构中。因此，无论这个网络上哪一个节点被炸，其他节点都还活着，新加入的小伙伴就可以从这些节点里同步数据到自己的电脑。想要让区块链数据消失，那把地球炸了吧。
而这种加入点对点网络的设计，就叫“去中心化”，只要网络上还有一个节点活着，区块链的数据就不会消失。
虽然区块链技术已经出现了好几年，但是对它的运用还是处于开发的初级阶段，更多被开发数字货币。目前区块链主要还是用于比特币等数字货币在全世界进行互联网支付业务，使各国法定货币在全球范围内毫无阻碍地顺畅流转。
Although the national regulatory structure of the payment system is more complex, but cooperation between these countries still made no small progress. Since 2016 Britain issued the first e-money license, have led to widespread concern in the industry. UK consumers can enjoy fast transfer payments and the sale of Bitcoin and other services as consumers like the United States.
With technical staff from the block chain to break the old rules restricting the numerous convention, the subversion of the inherent logic of the network, operating modes and business scope, we are about to enter a whole new set of block chain applications previously not involved.