Few pictures to read the block chain technology in the end is what? https://www.cnblogs.com/behindman/p/8873191.html
The term "block chain" can be said to be extremely strong, did not seem to talk to someone on the internet financial summit to block out the chain technology, BAT major banks and what financial institutions are beginning to own the block chain research work, and even IBM has recently set up his own research laboratory block chain, but in fact block chain in the end what is? we may not know, stay in the smoke and mirrors of the state. Starting today, let us into the block chain, block chain unveiled it!
Take fast chain? You want to say is block chain, right?
Make it clear block chain, in terms of our first story.
You must have heard the story of three into a tiger, right?
Suppose a person tells you that bad, there are tigers on the street, you believe?
I went, Why do not you play by the rules ah, do not believe you have to say!
Again! We are talking about a real tiger!
Action!!!
Good! Very good !! actor-class performances !!!
Continue, this time for doing a bunch of people tell you about it!
We are back to a scenario.
If a highly respected, you trust in the old man to tell you this, you are going to think?
Yes, this is the power of so-called trust. You do not trust a single individual is not sufficient creditworthiness,
But you would trust a bunch of separate individuals or individual sufficient creditworthiness.
In reality, banks have sufficient credit is this individual (center).
But the Bank as a credit intermediary is a cost,
The general public and we will pay for this massive credit costs.
So it will bring up the financial industry is the most profitable industry.
To remove an endorsement center credit institutions and other banking?
Then we can use the above-mentioned had "a bunch of individuals", which is the core technology of the block chain.
The block chain is essentially to solve the issue of trust, trust reduce the cost of technical solutions,
The purpose is to decentralization, to credit intermediaries.
Bit block chain is the underlying technology currency.
The concept Bitcoin (BitCoin) of this first Central Cong in 2009 suggested that you put it into a digital currency can understand.
We bitcoin block chain transaction as an example to look at specifically how to do.
1、把每笔交易在全网广播。让全网承认有效，必须广播给每个节点。
2、矿工节点接收到交易信息后，都要拿出账簿本记载该次交易。
一旦记录，就不可撤销，不能随意销毁。
矿工节点是通过电脑运行的比特币软件对交易的进行确认的。
为了鼓励矿工的服务，对于其所记录和确认的交易，
系统为矿工提供25个比特币作为奖励。(这个奖励数量，系统设定每4年减半)
奖励只有一份，那就看谁记录的快呗。
为了减少这种情况，系统会出一道十分钟的运算题，
谁能最快解出值，谁就将获得记录入账权利，并赢得奖励。
对了，这里可以给大家看一道据说是徐汇区幼儿园升小学的运算题。
别急啊，你试试看，我第一次反正是做错了。
……，好吧，我无力反驳。
说远了，我们再说回来。
前述区块链中所运用算法并不是简单的计算题，而是使用哈希散列(Hash)算法。
哈希散列是密码学里的经典技术，可以用来验证有没有人篡改数据内容。
3、获得记账权的矿工将向全网广播该笔交易，账簿公开，其他矿工将核对确认这些账目。交易达到6个确认以上就成功记录在案了。
矿工记录的时候，还会将该笔交易盖上时间戳，形成一个完整时间链。
4、当其它矿工对账簿记录都确认无误后，该记录就确认合法，矿工们就进入了下一轮记账权争夺战。
矿工的每个记录，就是一个区块(block)，会盖上时间戳，每个新产生的区块严格按照时间线形顺序推进，
形成不可逆的链条(chain)，所以叫做区块链(Blockchain)。
而且每个区块都含有其上一个区块的哈希值，确保区块按照时间顺序连接的同时没有被篡改。
这时候我们再看对区块链的原始定义就能理解了：区块链是一种分布式数据库，是一串使用密码学方法相关联产生的数据块，每个数据块都包含了一次网络交易信息，用于验证其信息的有效性和生成下一个区块。
若两个人同时上传，虽然这个概率很小，但是若发生，我们就看最后的区块链哪条更长，短的那条就失效。这就是区块链中的“双花问题”(同一笔钱花两次)。对于要制作虚假交易，除非你说服了全网里超过51%的矿工都更改某一笔账目，否则你的篡改都是无效的。
网络中参与人数越多，实现造假可能性越低。
这也是集体维护和监督的优越性，伪造成本最大化。
说服51%的人造假还是灰常灰常难的。
好了，我们总结下，区块链主要有以下核心内容：
1、去中心化
这是区块链颠覆性特点，不存在任何中心机构和中心服务器，所有交易都发生在每个人电脑或手机上安装的客户端应用程序中。
实现点对点直接交互，既节约资源，使交易自主化、简易化，又排除被中心化代理控制的风险。
2、开放性
区块链可以理解为一种公共记账的技术方案，系统是完全开放透明的，账簿对所有人公开，实现数据共享，任何人都可以查账。开放效果类似这样：
3、不可撤销、不可篡改和加密安全性
区块链采取单向哈希算法，每个新产生的区块严格按照时间线形顺序推进，时间的不可逆性、不
“区块链”的概念可以说是异常火爆，好像互联网金融峰会上没人谈一谈区块链技术就out了，BAT以及各大银行还有什么金融机构都在开始自己的区块链研究工作，就连IBM最近也成立了自己的区块链研究实验室，但其实区块链到底是什么?大家或许并不清楚，停留在雾里看花的状态。从今天开始，就让我们一起走进区块链，揭开区块链的神秘面纱吧!
取快链?你想说的是区块链吧?
要说清楚区块链，我们先来讲个故事。
你一定听说过三人成虎的故事吧?
假设一个人告诉你，不好了，大街上有只老虎，你相不相信?
我去，你咋不按常理出牌啊，你要说不相信!
重来!我们说的是真老虎!
Action!!!
好!非常好!!影帝级的演出!!!
继续，这时候换做一堆人告诉你这件事!
我们再换一种场景。
如果一个德高望重、你十分信任的老者告诉你这件事，你又会怎么想?
是的，这就是所谓的信任的力量。你不信任一个没有足够信用度的单独个体，
但你会信任一堆个体或者有足够信用度的单独个体。
在现实社会中，银行就是这个有足够信用度的个体(中心)。
但以银行等作为信用中介是需要成本的，
而我们普通大众就要为这庞大的信用成本买单。
所以才会造就金融业是最赚钱的行业。
要去除银行类等中心机构的信用背书?
那就可以用我们上面提到过的“一堆个体”，这也是区块链技术的核心。
区块链本质上是解决信任问题、降低信任成本的技术方案，
目的就是为了去中心化，去信用中介。
区块链是比特币的底层技术。
比特币(BitCoin)的概念最初由中本聪在2009年提出，你把它理解成数字货币即可。
我们以比特币交易为例来看看区块链具体是如何操作的。
1、把每笔交易在全网广播。让全网承认有效，必须广播给每个节点。
2、矿工节点接收到交易信息后，都要拿出账簿本记载该次交易。
一旦记录，就不可撤销，不能随意销毁。
矿工节点是通过电脑运行的比特币软件对交易的进行确认的。
为了鼓励矿工的服务，对于其所记录和确认的交易，
系统为矿工提供25个比特币作为奖励。(这个奖励数量，系统设定每4年减半)
奖励只有一份，那就看谁记录的快呗。
为了减少这种情况，系统会出一道十分钟的运算题，
谁能最快解出值，谁就将获得记录入账权利，并赢得奖励。
对了，这里可以给大家看一道据说是徐汇区幼儿园升小学的运算题。
别急啊，你试试看，我第一次反正是做错了。
……，好吧，我无力反驳。
说远了，我们再说回来。
前述区块链中所运用算法并不是简单的计算题，而是使用哈希散列(Hash)算法。
哈希散列是密码学里的经典技术，可以用来验证有没有人篡改数据内容。
3、获得记账权的矿工将向全网广播该笔交易，账簿公开，其他矿工将核对确认这些账目。交易达到6个确认以上就成功记录在案了。
矿工记录的时候，还会将该笔交易盖上时间戳，形成一个完整时间链。
4, when the other miners are all correct books and records, the record would confirm legitimate, the miners entered the next round of battle for bookkeeping.
Each record miner, is one block (block), will be time stamped, each block newly generated strictly linear advance in chronological order,
Formation of irreversible chain (chain), so called block chain (Blockchain).
And each block contains the hash value on which a block, a block in order of time while ensuring the connection has not been tampered.
This time we look at the original definition of the block chain will be able to understand: the block chain is a distributed database, uses a series of data blocks associated cryptographic method of generating each data block contains a network transaction information is used to verify the validity of its next generation of information and a block.
If two people upload, although the probability is very small, but if it occurs, we will see which of the last block chain is longer, short piece on the failure. This is the "double issue" block chain (spend the same money twice). For to make fraudulent transactions, unless you convince the whole network in more than 51% of miners are changed to a sum of accounts, or your tamper are invalid.
The more the number of participants in the network, to achieve the lower the possibility of fraud.
This is the collective maintenance and supervision of the superiority of counterfeit maximize cost.
Convince 51% of fraud is very very difficult.
Well, our summary, block chain mainly in the following core elements:
1, to the center
This is the block chain disruptive characteristics, any central authority and the central server does not exist, all transactions have occurred in the client application installed on everyone's computer or mobile phone.
Direct interaction point, which saves resources, the transaction autonomy, facilitation, and eliminate the risk of being controlled by the central agency.
2, open
Block chain can be understood as a public accounting of technical solutions, the system is completely open and transparent, open to all books, data sharing, anyone can audit. Open effect like this:
3, irrevocable, non-tamper security and encryption
Block chain to take a one-way hash algorithm, each block produced in strict accordance with the new time linear sequence advances, the irreversibility of time, not