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      What Is Blockchain Technology
      發布時間:2020年05月01日     賀叢芝 譯  
      來源: 英語世界
      字號 簡體 繁體 打印

      What Is Blockchain Technology


      Blockchain is a mathematically designed structure to store data in a way which is almost impossible to hack or fake it out. And the technology which is used to do so, is called Blockchain Technology. The wide range of use cases of Blockchain to store all kind of valuable data in almost each & every industrial sector made this topic extremely hot nowadays. It’s difficult to explain Blockchain Technology without going in details, but here, I’ll try to make it as simple as possible, I Promise!


      How was it born?


      We cannot begin to discuss blockchain stocks without first giving a brief nod to Satoshi Nakamoto, the acknowledged inventor of the technology. On October 31 of 2008, Satoshi Nakamoto released a white paper called “Bitcoin: A Peer-to-Peer Electronic Cash System.” The document issued to the subscribers of the cryptography mailing list described a revolutionary technology that created the world’s first genuine peer-to-peer and decentralized monetary system.

      在討論區塊鏈技術股的行情之前,我們先來簡單認識下公認的區塊鏈技術發明者中本聰。2008 年 10 月 31 日,中本聰發布了一篇白皮書,題為《比特幣:一種點對點電子現金系統》。這篇論文被發送給密碼學郵件組論壇的所有成員,文中描述了一項具有革命性的技術,由此誕生了世界上第一個真正點對點、去中心化的貨幣系統。

      Then, on 9th Jan, 2009, Satoshi started mining the first Bitcoins with GenesisBlock, and that’s how the Age of Cryptocurrency started, and the technology that made it happen, is what we now recognize with the word “Blockchain”. By combining Cryptography with Blockchain, Nakamoto solved the problem of double spending which was on the edge for decades to create digital cash. It also eliminates the need for central authority or third party to mediate electronic exchange of a currency.


      Satoshi Nakamoto is an enigma, and to this day it is not known whether this is the name of a single individual or a group effort, but what’s known is that blockchain technology changed the way money is handled in 2008 when it first hit the market as bitcoin. It continues to allow innovation today. So, what is a blockchain? You don’t need a ton of information about how it works to understand that you are investing in the future of data as we know it. That means everything from bank transfers (AKA money) to personal information. In essence, a blockchain is a data recording system where every link in the chain has its own data and information from the block both before and after it.

      中本聰一直是一個謎,他究竟是一個人,還是一個團隊,至今尚未可知。但我們知道的是,2008 年,區塊鏈技術以比特幣的形式首次進入市場,就改變了貨幣的流通方式。如今,這項技術仍然在不斷創新。那么,區塊鏈到底是什么?即使不用通過大量的信息了解它的運作方式,你也能夠明白,你是在投資數據的未來,這是 我們所知道的。這涵蓋了從銀行轉賬(也就是貨幣)到個人信息等所有數據。從本質上講,區塊鏈就是一個數據記錄系統。在這個系統中,鏈條上的每個區塊都有自己的數據和信息,這些數據和信息來自它前面和后面的區塊。

      To change the data would change the entire block so it would no longer fit in the chain. To change the chain you need a whole lot of information, and there’s additional protection. Eachblockchain is verified many times overby independent “miners” who view and verify the information so that any changed block no longer matches every other copy of that block. In short, a blockchain is an unprecedented level of data security. Think of it as a letter (the data) that you might put in the post and send anywhere (the transfer of data). That letter goes in a clear box, and that clear box goes in a truck full of cameras run by different people, using various sources of electricity, and all those people can see the letter. If anyone messes with the message, everyone can see it has changed.



      What does blockchain do?


      Almost each & every cryptocurren-cy-blockchains consist of five stages ina block generation process:


      1. Transaction signing by a user

      1. 一名用戶進行交易簽名

      2. Transaction broadcasting to the network

      2. 將交易廣播到網絡

      3. Block creation by the miners

      3. 礦工創建區塊

      4. Block broadcasting to the network

      4. 將區塊廣播到網絡

      5. Validating and adding this new block by the network-nodes to the blockchain

      5. 網絡節點驗證新的區塊并將其添加到區塊鏈中

      How secure is blockchain?


      This and that, everything is correct, but is it really secure? Specifically stating, can blockchain offer trustless environment to record private and tamperproof blocks? The short answer is no. 100% pure and perfect immutability does not exist, blockchain like any other web software or network, is theoretically and technically vulnerable to modify.


      So, is it not any secure at all? Again, the answer is no. As all of the nodes on a blockchain are decentrally distributed, to alter a chain, one would need to take control of more than 51% of total mathematical computing power4 and alter all of the transactional records in a distributed ledger within a very short space of time (e.g. Average Block Time for Bitcoin–10 minutes, Ethereum–14seconds). Modification is nearly impossible, which makes the network 99.99% immutable and secure. So, it is till now, this has never happened secure.

      那么,它一點也不安全嗎?當然,答案也是否定的。區塊鏈上所有節點都是去中心化分布的,要想更改區塊鏈,須掌控全網數學算力的 51% 以上,在極短的時間內(比如,比特幣平均每個區塊生成時間是 10 分鐘,以太坊為 14 秒)篡改分布式賬本上所有交易數據。這幾乎是不可能實現的,也就是說,網絡 99.99% 是不可變且安全的。所以,區塊鏈很安全,起碼到現在為止,從沒出過什么事。

      Types of blockchains


      1. Public blockchains

      1. 公有區塊鏈

      A public blockchain, which has absolutely no access restrictions, uses Proof of Stake or Proof of Work algorithm to secure the network. Some of the popular public blockchains are Bitcoin and Ethereum.


      2. Private blockchains

      2. 私有區塊鏈

      A private blockchain is also called “Permissioned” blockchain, as any- one can’t read/write or review/audit the source code data unless one has the permission(s)/right(s) from the network administrators to do so. Usually, single organization controls this type of blockchain for their personal use. Example of popular private blockchain is Ripple.

      私有區塊鏈也被稱為“許可”區塊鏈。除非獲得網絡管理員的許可 / 權限,否則任何人都不能讀 / 寫或檢查 / 審計 源代碼數據。通常,私有區塊鏈由某個組織控制,僅供內部使用。瑞波幣就是一種私有區塊鏈。

      3. Consortium blockchains

      3. 聯盟區塊鏈

      A consortium blockchain is also called “Semi-Decentralized” or “Federated” blockchain, as instead of a single organization controlling it, a number of organizations control the blockchain according to their nodes’ permission(s)/right(s).

      聯盟區塊鏈又稱“半去中心化”或“聯合”區塊鏈。它不是由某個組織控制,而是由 多個組織根據各自節點的許可或權限來控制。