区块链的背书是什么意思啊,区块链的背书是什么意思呀

区块链的背书是指在区块链系统中，每一个交易都需要被一定数量的节点所认可，这种认可就叫做背书。背书是区块链系统中最重要的一环，它是保证区块链系统安全的关键。下面我们来认识一下与背书有关的三个关键词：共识机制、节点组织和激励机制。

共识机制是指在区块链系统中，节点之间通过一种机制来达成一致，从而确保系统的安全性。目前，最常用的共识机制是工作量证明（Proof of Work），它是由比特币的发明者中本聪提出的，也是最受欢迎的一种共识机制。工作量证明机制的原理是：参与节点需要花费大量的计算资源来解决一个复杂的数学问题，拥有最快速度的节点可以解决数学问题，从而获得新区块的打包权利，其他节点则需要验证该节点的答案是否正确，从而完成对区块的背书。

节点组织是指在区块链系统中，节点之间的组织形式。一般来说，节点组织可以分为两类：公有链和私有链。公有链是指任何人都可以参与的区块链系统，比如比特币、以太坊等；私有链是指只有特定组织或者个人可以参与的区块链系统，比如企业私有链、政府私有链等。不同的节点组织会产生不同的背书方式，比如公有链一般采用工作量证明机制，而私有链则可以采用其他的共识机制。

激励机制是指在区块链系统中，为了鼓励参与者参与系统的运行，系统会提供一定的激励。比如比特币的挖矿机制，挖矿成功的节点可以获得一定数量的比特币作为奖励；而以太坊的激励机制是每一个区块都有一定数量的以太币奖励，参与背书的节点可以分享这部分奖励。激励机制可以有效地鼓励节点参与背书，从而确保区块链系统的安全性。

以上是关于区块链背书的三个关键词：共识机制、节点组织和激励机制的介绍，它们是区块链系统安全的关键，也是背书的核心。只有通过这些关键词，才能确保区块链系统的安全性。

『一』In the introduction to Bitcoin, "traditional electronic currency relies on legal currency endorsement", what does it mean?

Alipay, the number in the bank card is not itself Currency, but the accounting symbol of RMB.
In the gold standard era decades ago, banknotes were backed by gold, which meant that banknotes were not currency, but the accounting symbol of gold.
The number of Bitcoins is limited and cannot be forged, so there is no need for anything to back it up. Back then, people believed that the U.S. dollar was unreliable and prone to over-issuance, so it needed to be used as the accounting symbol for gold. Now people have become accustomed to the over-issuance/unreliability of the U.S. dollar, so they have left the gold standard. But the number in the bank card cannot be separated from the endorsement of RMB, otherwise the number will grow too fast. "Endorsement" means credit support: if you have a balance in Alipay, Jack Ma will unconditionally allow you to withdraw RMB without any denial. The total amount of funds in everyone's Alipay is equal to the total deposits of Alipay Company in the bank. This kind of strict correspondence is called "endorsement"