March 2022
Intermediate to advanced
293 pages
5h 31m
Chinese
Content preview from 精通区块链
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区块链技术的起源 ｜ 13
出版社。在
20
世纪
90
年代，互联网上的商业对于很多人来说比较陌生，大
多数人担心被欺诈而不愿意在网络上使用信用卡，更别说采用一种全新的支
付系统。但是许多注重隐私的用户使用
cyberbucks
，甚至还开发了一个邮件
列表市场并运行了一段时间。不过由于缺乏商户，数字现金始终无法获得市
场认可，最终在
1998
年申请破产。
1.3.2
电子黄金
1996
年诞生的电子黄金
（
E-Gold
）是依托真实的贵金属的数字价值存储。电
子黄金由一家名为金银储备（
Gold & Silver Reserve
）的公司经营，它使其用
户之间能够在互联网上进行即时转账。平台上的所有东西都以黄金或其他贵
金属单位计价。到
2006
年，有超过
350
万个电子黄金账户。当时，该公司日
交易额达
590
万美元。
该平台支持面额小至万分之一克黄金，是首次在互联网上引入小额支付或转
移小额价值的概念的平台。电子黄金在当时具有创新性，为开发者提供了
API
，以便开发者在该平台上创建附加服务。在网络购物中，商家接受电子黄
金作为与信用卡并列的一种支付方式。在
1999
年开始支持移动支付。
在
1990
年代和
2000
年代初，电子黄金的功能在技术上是非常巧妙的。该系
统从一开始就存在问题并最终导致了它的失败。作为一个中心化的系统，它
缺少可以将账户与用户的身份联系起来的机制。因此，该平台被用于洗钱、
网络诈骗和其他非法活动。最终在
2008
年美国政府关闭了电子黄金，没收了
其资产并为账号持有人提供赎回制度。
1.3.3
哈希现金
哈希现金（
Hashcash ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.