Explore
For Enterprise
Join for Free
Log In

艺术与人文
商务
计算机科学
数据科学
信息技术
健康
数学和逻辑
个人发展
物理科学与工程
社会科学
语言学习
学位
证书

浏览 Coursera 的全部课程

浏览
搜索
企业版
登录
免费加入

Blockchain Part I

Loading...

Digital Transformation

波士顿咨询公司

4.8（1,108 个评分） | 31K 名学生已注册

Digital transformation is a hot topic--but what exactly is it and what does it mean for companies? In this course, we talk about digital transformation in two ways. First we discuss the pace of change and the imperative it creates for businesses. Next we provide the context for this transformation and what it takes to win in the digital age. Then we walk through BCG's proprietary framework, which helps you identify key areas to digitize, including strategy, core processes, and technology. By the end of this course, you'll be able to: --describe the underlying economics of innovation, technology, and market disruptions --weigh the pros and cons of current digital technologies driving advancement --utilize BCG's digital transformation framework as a ""how-to"" for digitizing your organization

查看授课大纲

您将学习的技能

Technology Disruption, Digital Trends, Competitive Lifecycle, Digital Strategy, Strategic Management

审阅

4.8（1,108 个评分）

5 stars
904 ratings
4 stars
178 ratings
3 stars
16 ratings
2 stars
4 ratings
1 star
6 ratings

SS

May 25, 2019

The course material is fantastic and was delivered capably by the instructors. the interviews with the experts were value adds and provided good insights into the application of the concepts.

IS

Jul 15, 2018

Really good well structured course with both relevant and very interesting content. I would highly recommend this course to anyone who would like to learn more about Digital Transformation.

从本节课中

Digital Trends Past and Future

Change as a constant has never been truer than with digital transformations. This week we will look at the key drivers of digital transformation, opportunities they have already established and the challenges they bring. Then we will explore emerging trends and technologies, what is possible/likely in the future, and currently what we're seeing in practice.

Artificial Intelligence Part I7:43

Artificial Intelligence Part II7:24

Blockchain Part I8:59

Blockchain Part II8:10

Interview with Nicolas Harlé on Blockchain8:08

教学方

Michael Lenox
Senior Associate Dean and Chief Strategy Officer
Amane Dannouni
Principal at Boston Consulting Group, Singapore
Sonja Rueger
Project Leader, Boston Consulting Group
Ching Fong Ong
Senior Partner and Managing Director, Boston Consulting Group

脚本

Of all the trends we have discussed by now,

blockchain is probably the most complex and least understood.

But potentially, it is one of the most impactful.

Remember that in the first module, FAB events has drawn a parallel to

this technology and what Internet was to communication in 1994.

Or what personal computers were to computing even before that.

First of all,

let us try to understand in what context blockchain technology can be useful.

To avoid confusion we will take an example that is not linked to digital money or

cryptocurrencies.

Imagine that you want to buy a house in the countryside.

You found one advertised in a forum with a short description and

nice photos posted by the owner.

Would you trust what you see?

Probably not.

You want to make sure first that the apparent owner is the really the owner.

And ideally,

you'll want to have an objective record of what happened to the house.

When was it built?

How big is it?

Was it renovated recently?

Does it fulfill certain standards and regulations, and so on.

Traditionally, this information would be stored in a ledger.

A bookkeeping that includes all the asset history.

The ledger would typically be stored centrally under title authority,

basically, an intermediary that you should be able to trust, and that,

therefore, facilitates the transaction between you and the owner of the house.

This intermediary authority will guarantee

that you are buying the right asset from the right owner.

It will also be the one that will keep records of your purchase and

you will refer to it later when you need to prove your ownership.

Also it probably takes some time to update and consult the ledger.

And the title authority will charge you a fee for that.

But it's the best you can get until blockchain came to play.

So how does blockchain make buying a house different?

To answer this question, let us spend some time discussing what blockchain really is.

Given the time limitation, we will focus on the general idea of blockchain,

and not go into technical implementation details like the exact

role of cryptography or the consensus building rules.

Simply speaking, blockchain is a ledger, a ledger built in a way

that allows you to trust its information without needing an intermediary authority.

In our example, it will include all the records on the house you want to buy.

But this digital ledger is fundamentally different from the one that we described

before.

And there are two characteristics that make it different.

Firstly, it is open, and secondly, it is distributed.

What does open mean?

It means that anyone can have access to it and

either read from it or write new transactions into it.

This fact makes it a bit more problematic to maintain trust in the ledger contents.

So in the ledger,

you need to have a protocol which accepts only the transactions that make sense.

For example you can only transfer the ownership of a house

if you yourself happen to own it.

To verify this transfer, every record or transaction that is written in the ledger

includes a digital signature that uniquely identifies who has written it.

The combination of few transactions and their signatures is what we call a block.

If the transactions within the block are allowed by the ledger protocol,

the block is then signed by a unique key that validates the records.

When the next transaction is created,

a reference to the first block is included at the start of the second

black to guarantee that the sequence of transactions is respected.

Then, the same validation process starts again and again.

Through this process, dependencies between the records are created.

Like in a chain, that's why we call it blockchain.

If at any point in time someone wants to change the content of a block,

he needs to change its key.

Then change the keys in all the following blocks.

If you make it hard enough for a key to be generated for a block using cryptography,

then tampering with the ledger becomes very difficult, even impossible.

So, this is how an open ledger works.

Now, let's see how to make it distributed.

First of all, the reason you want to make it distributed is precisely to get rid

of the intermediary authority.

If everyone has a copy of the ledger,

then you don't need the intermediary to store it.

By the way, it is interesting to note here how memory inefficient this will become.

Instead of starting it once,

you are basically duplicating the ledger in every laptop, every computer.

You can think which one of the three fundamental laws we have talked about in

the previous video makes this possible.

In a distributed ledger, whenever someone wants to add a record he or

she would need to announce it to the full network.

All copies of the ledger are then updated accordingly.

In practice, though, it is not that simple.

To validate a transaction, you make the network members compete to

solve a difficult random mathematical problem requiring a lot of computation.

For each block, the winner of the competition validates the transactions,

signs the block, and adds it to the chain.

In this construct, if a single person

wants to insert fraudulent transactions in the block chain,

he needs to have more computing power than the rest of the network combined.

This is how blockchain as a distributed open ledger got a lot of traction.

Not simply because it stores information, but

because it creates trust without the need of any third party intermediation.

This also explains why the natural start of blockchain was in the financial

industry.

A system that relies on a lot of trust in its institutions.

In 2008 Satoshi Nakamoto, not his real name,

wrote a paper describing a protocol to transfer digital cash

between individuals without the need of a back intermediation.

You have certainly heard about it, it's called BitCoin.

Before going any further let me kill a popular myth,

BitCoin and blockchain are not the same thing.

Blockchain as a technology has many other application areas

beyond creating digital currencies.

We will discuss this in more detail soon.

Nevertheless, BitCoin generated a lot of interest from investors

in the overall technology.

And investment in Blockchain startups peaked in the first quarter of 2015 at

almost $300 million.

The volatility of Bitcoin, however, as a cryptocurrency and few other incidents

that happened over time, brought the investment amount down, over the years.

But it also prompted tech entrepreneurs to build new blockchain or

blockchain-based applications.

Their objective was to completely disintermediate established players.

探索我们的目录

免费加入并获得个性化推荐、更新和优惠。

Coursera 致力于普及全世界最好的教育，它与全球一流大学和机构合作提供在线课程。

© 2019 Coursera Inc. 保留所有权利。

通过 App Store 下载

通过 Google Play 获取

Coursera
关于
管理团队
工作机会
目录
证书
MasterTrack™ 证书
学位
企业版
政府版

社区
Learners
Partners
Developers
Beta Testers
Translators

连接
博客
Facebook
领英
Twitter
Instagram
YouTube
技术博客

更多
条款
隐私
帮助
内容访问
媒体
联系我们
目录
附属公司