区块链入门 | 我不允许你还不知道！
趣链区块链是不是听腻了冗长复杂、通篇技术的区块链科普？？ 趣链科技作为国际区块链技术领军品牌，为您用最白话最有趣的方式带来区块链入门科普栏目。 喜欢桔子的大朋友小朋友快订阅我的专辑关注我啊！！！私聊桔子获取更多区块链行业前沿动态、趣链产品介绍和用户案例等最新资讯哦～...
| Publishes | Twice weekly | Episodes | 23 | Founded | 3 years ago |
|---|---|---|---|---|---|
| Language |  ZH-CN | Categories | EducationTechnologyCourses | ||
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BaaS的全称是blockchain as a service，区块链即服务。我们应该经常听到各种aaS！SaaS、IaaS、PaaS…今天桔子就给大家详细介绍一下什么是BaaS! BaaS是指将区块链框架嵌入云计算平台，利用云服务基础设施的部署和管理优势，为开发者提供便捷、高性能的区块链生态环境和区块链配套服务，比如公共联盟链服务、跨链服务、可信存储服务和安全计算服务。一般来说，一套完整的 BaaS 解决方案包括了设备接入、访问控制、服务监控和区块链平台四个主要环节，应用场景涵盖司法、金融、医... more
之前的课程中桔子提到区块链急需提升效率、互操作性和可拓展性，以此为目标衍生出了分片、侧链、跨链等技术。波卡是基于跨链设想、substrate开发框架的下一代区块链协议，它的设计愿景是将多个专用区块链连接到一个统一的网络中，实现万链互联。之前我们说到跨链的技术实现方式一般有三种：公证人机制、中继链和哈希锁定。波卡采用的是基于中继链的跨链方式，连接到波卡的分片链被称作为平行链。我们可以把波卡看作是一种树状的网络结构，中继链是树根，然后外接一定数量的平行链就像树枝。另外，波卡允许平行链拥有可以为特定任... more
21. IPFS星际文件系统今天我们要讲解的是IPFS。众所周知, 互联网是建立在HTTP协议上的。HTTP协议是个伟大的发明, 让我们的互联网得以快速发展。但是互联网发展到了今天HTTP逐渐出现了成本高、效率低下、数据过于中心化等不足。IPFS全称星际文件系统，是一个点对点的分布式文件存储系统，能够将数据以去中心化的形式，就近分散存储在各节点中，这可以让我们的互联网速度更快，更加安全开放。所有的IPFS节点组成了一个分布式的网络，每个节点都可以存储文件，也可以通过分布式哈希表的方式读取、下载文... more
大家好，今天桔子要给大家介绍的是预言机。简单来说，预言机是联系区块链与现实世界的桥梁，能将现实世界的最新信息反馈给区块链系统。首先我们要知道，区块链其实是一个确定且封闭的系统，这赋予了区块链一定的稳定性，但同时也意味着这样的系统缺乏了灵活度和实效性。区块链的运作往往不能完全独立于现实世界，因为触发智能合约的“预设条件”可以是哪位总统赢得了选举、公司的股价涨跌、甚至是今天的天气情况等等。当区块链网络无法搜集外界信息的时候该怎么办呢？预言机横空出世，成为了区块链与现实世界交互的接口，可以查找并验证来... more
19. 隐私保护之【联邦计算】联邦计算是指通过安全多方计算或者可信执行环境实现数据的拥有方和数据的贡献方之间的数据安全共享方式。各节点之间通过加密机制进行参数交换，在满足安全保密的情况下构建虚拟计算模型，使不同机构的数据不需出库，数据自身并不移动，将计算结果通过安全聚合的方式在各机构之间进行共享和传递，从而实现数据的点对点安全交换以及“可用不可见”式共享。比如，桔子想要统计一下25到30岁年龄段人的平均工资，桔子找了包括趣链在内的三家不同行业的企业作为样本，但是桔子拿不到趣链员工的工资信息，更拿... more
18. 隐私保护之【安全多方计算MPC】安全多方计算是指在没有可信的第三方的情况下，多个参与方一起计算一个约定的函数，并且保证每一方仅能获取自己的计算结果，无法通过计算过程中的交互数据推测出其他人的输入值和输出值！1986年姚期智院士提出了“百万富翁问题”，他假设了这样一个场景：两个大富翁在街头碰面了，因为闲得无聊就想比一比谁更有钱，但是谨慎的富翁又不想让对方知道自己具体有多少钱。既然不想让对方知道，那自然也不想让任何第三方知道。“百万富翁问题”后经发展，成为现代密码学中非常活跃的研究领域，即安... more
17. 隐私保护之【零知识证明】随着大数据、人工智能、移动互联网等新兴技术的不断普及，人们的隐私泄露问题也日益严重。桔子在前面的课程里反复提到区块链的特点是公开透明，但这并不代表我们在区块链上需要牺牲隐私权。今天桔子就给大家讲一讲隐私保护的关键技术之一，零知识证明！零知识证明是一种常见的加密协议。在零知识证明的过程中，证明者需要向验证者证明某件事情是真实的、成立的，但不需要泄露除该陈述以外的任何信息。那为什么要使用零知识证明呢，想象一下，如果我想要知道桃子是否有驾照，一般来说桃子为了证明她有驾照... more
16. 跨链技术，打破区块链信息孤岛困境！大家好呀，桔子今天要给大家介绍的是跨链的概念。跨链的热度一直居高不下，甚至有人说跨链是区块链的未来。所以跨链到底是什么呢？集中注意力往下听吧！我们应该经常听到一句谚语：要想富，先修路。不光现实世界的发展需要与外界资源进行互通，其实区块链也需要实现数据交互和价值流通。尤其是眼下区块链的协议越来越多，公链私链联盟链遍地开花，人们迫切需要一种技术帮助链与链之间产生交互，实现链间协作。跨链就是背负着这样的使命诞生的。链与链之间需要彼此的数据却又担心商业机密在共享... more
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