March 2022
Intermediate to advanced
293 pages
5h 31m
Chinese
Content preview from 精通区块链
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12 ｜ 第 1 章
1.3
比特币的先驱者
互联网的普及已经颠覆并改变了许多行业。仅列举几个例子，在过去的几十
年里，维基百科或多或少取代了百科全书，
克雷格列表（
Craigslist
）取代了
报纸分类广告的位置，而谷歌地图则在大多数情况下使得纸质地图集过时。
然而，金融业却能在相当长的一段时间内抵御互联网的动荡变化。在
2009
年
比特币推出之前，除了用户从模拟货币（实体货币和支票簿）向数字货币（电
子银行）的转换之外，对货币的控制权并没有太大变化。由于这种转变，人
们已经熟悉了数字化的货币的概念，但这些系统仍然是中心化的。
在比特币之前，很多数字货币概念都被尝试过，并最终因为各种原因而失败，
但它们终极目标都是相同的：增加金融主权，或者说用户可以更好地掌控自
己的金钱。看看几个早期的失败案例，可以让我们更加了解为什么有越来越
多的人开始关注比特币的原因。
1.3.1
数字现金
数字现金（
DigiCash
）由大卫
·
乔姆（
David Chaum
）于
1989
年创立，是一
家促进匿名数字在线支付的公司。乔姆是盲签（
blind signature
）技术的发明者，
并提出使用密码学来保护在线支付中隐私。密码学利用基于加密的数学来掩
盖敏感信息，长期以来一直被世界各国政府作为通信工具使用。第
2
章比较
详细地介绍了密码学和加密技术。
数字现金平台有自己的货币，它被称为
cyberbucks
。注册该服务的用户将收
到
100
美元的
cyberbucks
，通常被称为代币（
token
）或硬币（
coin
）。该公
司率先推出了安全微芯片智能卡， ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.