With the heating up of Bitcoin, blockchain technology has been paid attention to by industries such as finance, securities and different applications. Blockchain is a relatively popular new concept, which contains two concepts of technology and finance . From a technical point of view, this is a distributed database that sacrifices consistency efficiency and guarantees eventual consistency. Of course, this is a relatively one-sided understanding. From an economic point of view, this kind of peer-to-peer network with strong fault tolerance just meets a necessary requirement of the sharing economy, that is, a low-cost trusted environment.
The introduction articles on blockchain technology, application and value are huge and dazzling, but most of the articles stay on the surface of the application, and they are still ignorant after reading, and it is difficult to go deep into the technical details and product design. So, how to effectively and quickly learn and master this technology for those who are developing or about to engage in blockchain technology? Personal suggestions can be made step by step from blockchain cognition, technical application and technical in-depth training , in order to quickly and effectively become a blockchain technology development expert.
What is blockchain?
Blockchain is a distributed database
Blockchain, originally widely used in Bitcoin (Bitcoin)
Blockchain, maintaining a continuous record of transactions
Each piece of data is called a block , and each block can contain more than one transaction
Each block will be linked with another block (Linking)
Each block will contain the hash value of the previous block , and all connected blocks are called a chain . A blockchain is a chain composed of multiple blocks.
How does blockchain work?
The process of generating blocks will go through complex cryptography calculations (Cryptography)
Complex cryptographic calculations can effectively prevent record tampering
Each block cannot be modified after it is successfully generated
The process of generating blocks is also called mining
The person responsible for generating the block is also called the Miner
The machines responsible for generating blocks are also called mining machines
Each piece of data can be connected to find all reliable historical data , and because it is a distributed database, it has the characteristics of " decentralization ". "Decentralization" means that the data will be distributed among multiple nodes, and all nodes will jointly maintain the entire database.
Co-maintaining the entire database means that no one can claim that their block is a legitimate and valid block
Maintaining the entire database together means that the blocks verified by the majority of people are legitimate and valid blocks
Jointly maintaining the entire database means that more than 50% of the people have authenticated the valid blocks
Each node must store all blocks (but new designs allow nodes to store only some of the blocks)
Each node can assist in verifying block validity
Any data tampering will destroy the block integrity
任何一笔数据被篡改的机率微乎其微！
以数字货币为例区块链操作包括: 交易与区块。交易就是转账过程的完整内容；区块包含一批交易的集合。
区块是一种记录交易的数据结构。每个区块由区块头和区块主体组成，区块主体只负责记录前一段时间内的所有交易信息，区块链的大部分功能都由区块头实现。
区块之间连接起来就是一个账本(Ledger)
区块链的基本原理就是让所有人共同维护一份账本
这份共同维护的账本必须由大伙共同认证，以比特币转账交易为例。
1、在比特币生态系统中，有许多运行中的电脑(节点)，每个节点都是一台挖矿机，即建立新的区块并加入账本。
当A想要转账给B时，要先由B建立一个地址(匿名)，把地址交给A后，再由A建立一个交易并通过广播的方式发布到比特币网络系统中。
2、比特币系统会自动挑选不同的节点来验证这笔交易的可靠性，通常一次交易会需要获得数个不同的节点来确认。被选中的节点至少会验证一个以上的区块(即本次交易所需的所有区块)来计算出本次交易产生的合法区块。
3、基本上每个节点都能产生区块，并且会相互验证彼此之间的有效性，当超过50%的节点都说这个区块是合法有效的，这个新的区块就会被写入账本，最后再将这些区块通过广播的方式发布回比特币系统。当比特币系统验证交易确实完成，A和B就可以看到这是一份“合法有效”的交易，且该交易被记录在特定一个区块之中，并且可以从中获得自己的账户中有多少钱。
4、事实上，并不是A和B拥有这份账本，而是整个比特币网络系统就只有一份账本(所有人的交易都记录在这里)，并分散存储在不同的节点中，每个节点都拥有一份完整的账本。
因此，这个账本是一份完全分布式的、去中心化管理、公开透明、无法篡改、又能匿名交易的一本账本。最后，总结一下区块链技术的五大特点:
完全开放的技术
去中心化的分布式构架
所有节点都以匿名的方式存在，共同验证整份账本
任何人想要篡改账本都要付出极高的代价，你必须让网络上所有包含你这笔交易的区块同时修改才能被视为有效。
完全自动化的冲突处理机制。例如同一笔交易在不同节点完成导致转账两次的情况。
Gartner预测，区块链技术正在从单一支持数字货币的基础技术架构向综合型数字化平台转变，智能合约和区块链当前的关注焦点和探索领域已经从较为单一的金融领域逐渐向政府部门、医疗保健、制造业、媒体发布、身份识别、所有权登记服务等领域扩散。
区块链技术正在以新的思维模式、技术架构冲击整个经济社会，随之而来，各行各业的区块链解决方案应运而生。
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为此，第二届世界智能大会邀请区块链产业、行业、技术不同领域的专家，共聚一堂，举办智能合约与行业区块链闭门论坛暨区块链技术讲座，进行深度技术专场培训。
关于购票方式，架构师技术联盟公号作为合作方，为读者粉丝提供粉丝特权购票方式，通过扫码下面二维码报名和注册可免费享受价值2800元的特权票，数量有限，先到先得。具体报名方式如下(邀请码: ICT_Architect):
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It doesn't matter if you miss out on the fan privilege ticket purchase, after all, the number is limited; this account also provides an early bird ticket purchase method, entering through the ordinary channel , you can enjoy a 40% discount on the ticket price. The 2nd World Intelligence Conference. For details of the training session on smart contracts and blockchain , please scan the code or click the original link to view.
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[Gift Ticket] Smart Contract and Blockchain Technology Session
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Please search "ICT_Architect" or "Scan" the QR code below to follow the official account, and click the original link to get more information about the conference .