This document is a series of slides from a presentation by Sam Wouters on blockchains and bitcoin. It discusses the key differences between open and private blockchains, how blockchains work through decentralization, immutability and other principles, and potential applications of blockchain technology beyond digital currency, including for finance, supply chains, identity and more. It argues that open blockchains have advantages over private blockchains in fostering innovation, though private blockchains may have some uses for internal networks.

1. @SDWOUTERS
Blockchains
OPEN & Private

2. samwouters.com
Speaker on Bitcoin & Blockchain
Digital Transformation Consultant
at Duval Union Consulting
WWW
sam.wouters@duvalunion.com
Sam Wouters
@sdwouters

3. ‣ We are a digital consulting company.
‣ Founded in 2009 as DearMedia.
‣ We work for large European clients.
‣ We have a strong vision on the
impact of digital and act accordingly.
‣ We are advisors, writers, coaches
and entrepreneurs.

4. One of many
DISRUPTIVE
PLAYERS

5. Invented in 2008: a system to eliminate
the need for “trusted” third parties
bitcoin.org/bitcoin.pdf

6. @SDWOUTERS
“bitcoin is
digital money”
Who has heard of Bitcoin before today?
Positive image? Negative image?
Who fundamentally
understands Bitcoin?

7. Media that predicted The Death of Bitcoin
bitcoinobituaries.com
Deaths by publication:
DailyPaulCNNCity A.M.ChronBroken Librarian BTC Feed Business Insider
BloombergAbout.com Acton BizNews.comArduino TronicapenwarrAOL
Financial TimesFester’s DenDavid Seaman FortuneForbesFool.com Fusion
Gizmodo Australia IEX International Business Times Javamazon Moneygeek
MyBroadBandMother Jones News.com.au NewStatesman NY Mag OUI Share
The New York TimesThe KernelThe Calculating InvestorStreet Insider
Sputnik NewsPYMNTS.com Reuters Robert Nielsen Salon Seeking Alpha
The Underground EconomistThe Telegraph The Washington Post The Weekly Standard
USA Today Valley News VICE News Wired YahooWall Street Daily

8. @SDWOUTERS
Bitcoin has been running non-stop for 7+ years
160M 434K $150M $105B
Transactions Blocks in the
blockchain
in transactions per
day currently
Transferred over
the blockchain
466M 16M 11B 160K
bitcoins transferred
over the blockchain
Amount of Bitcoins
that currently exist
Value of all
bitcoins
companies (indirectly)
accept bitcoins

9. Banks: Bitcoin can’t work,
it’s all about the Blockchain

10. @SDWOUTERS
Bitcoin is a way to digitally
transfer ownership
without a middleman
The blockchain is a
database that records
ownership throughout time
What’s the difference?

11. A 5 minute explanation won’t make
you understand why they matter

12. @SDWOUTERS
WHAT
can we do with them?
HOW
do they work?
WHY
do blockchains
exist?

13. @SDWOUTERS
WHY
do blockchains
exist?

14. @SDWOUTERS
WHY
do blockchains
exist?
Open Blockchains

15. @SDWOUTERS
Why do digital money transfers take days?

16. @SDWOUTERS
Fees hurt profit margins for businesses
9% FEE?

17. @SDWOUTERS
Financial innovation is held
back by rules and regulations

18. @SDWOUTERS
But this is innovation!

19. Say that to the 40% unbanked adults worldwide…

20. And to the people who pay
5-25% money transfer fees
@SDWOUTERS

21. @SDWOUTERS
If you want to send money you have to
WAIT PAY

22. @SDWOUTERS
Yet we can do THIS?
@SDWOUTERS

23. @SDWOUTERS
This is about more
than global payments
@SDWOUTERS

24. We have more debt than can EVER be repaid

25. @SDWOUTERS
We have unprecedented money printing

26. @SDWOUTERS
Soon you’ll be PAYING banks so they can
do risky investments with your money

27. Resulting in "cosy" relationships between
financial businesses and regulators.
We are fighting a never ending flood
@SDWOUTERS

28. @SDWOUTERS
WHY
do blockchains
exist?
Open Blockchains Private Blockchains
Make existing players
a few % more efficient
Make the world
a fairer place

29. @SDWOUTERS
HOW
do they work?
WHY
do blockchains
exist?

30. @SDWOUTERS
Open Blockchains
HOW
do blockchains
work?
1 Censorship resistance

31. @SDWOUTERS
Ownership is TRANSFERRED
directly between two parties

32. @SDWOUTERS
Transactions are synchronised through the network

33. How do we Record
transactions so nobody
can change them?
@SDWOUTERS

34. The blockchain is a global “bookkeeping” system
It records who owns what, and when
@SDWOUTERS

35. @SDWOUTERS
Open Blockchains
HOW
do blockchains
work?
1 Censorship resistance
2 Decentralization

36. @SDWOUTERS
Problems Solutions
Central point of failure Decentralized network
Expensive to secure Shared security cost
Trust who is in charge Trust a fixed set of rules
Centralized
All organizations

37. @SDWOUTERS
Problems Solutions
Central point of failure Decentralized network
Expensive to secure Shared security cost
Trust who is in charge Trust a fixed set of rules
Decentralized
The Internet & Bitcoin
Centralized
All organizations

38. The Bitcoin network is 20.000 times stronger
than the top 500 supercomputers in the world
Blockchains are secured by computing power
from people and companies all over the world
@SDWOUTERS

39. @SDWOUTERS
Open Blockchains
HOW
do blockchains
work?
3 Immutability
1 Censorship resistance
2 Decentralization

40. … The “miners” verify transactions and
add them to the next block in the Blockchain

41. @SDWOUTERS
Change a transaction? Change the link

42. @SDWOUTERS
The network will see and reject your fraud

43. @SDWOUTERS
To convince them you need to create a longer
blockchain than the entire network combined

44. @SDWOUTERS
Miners earn new currency and tiny transaction
fees for their work and electricity

45. @SDWOUTERS
Open Blockchains
HOW
do blockchains
work?
3 Immutability
1 Censorship resistance
2 Decentralization
4 Open access

46. Send payments
on any network,
without risk

47. An open blockchain is open to anyONE
without identification or authentication
@SDWOUTERS

48. @SDWOUTERS
No criminal wants to leave permanent evidence

49. @SDWOUTERS
Open Blockchains
3 Immutability
5 Open innovation
1 Censorship resistance
2 Decentralization
4 Open access
HOW
do blockchains
work?

50. Anyone can develop new applications for
an open blockchain, without permission

51. @SDWOUTERSinternetlivestats.com/internet-users/
The same force driving internet innovation for 20 years

52. @SDWOUTERS
Creates huge value for consumers, economic growth, jobs

53. @SDWOUTERS
Open Blockchains Private Blockchains
Editability 3
Centralization 4
Interoperability 1
Business innovation 5
Permissioned access 2
3 Immutability
5 Open innovation
1 Censorship resistance
2 Decentralization
4 Open access
HOW
do blockchains
work?

54. @SDWOUTERS
WHAT
can we do with them?
HOW
do they work?
WHY
do blockchains
exist?

55. @SDWOUTERS
Sending money
0.00000001 BTC1 BTC

56. Money is the
tip of the iceberg

57. @SDWOUTERS
What other opportunities are out there?
Finance
Internet of Things?
Energy?
Supply chain?
Identity? Property?
Legal?

58. @SDWOUTERS
The major challenge of Supply Chain blockchains
Getting everyone on the same chain

59. @SDWOUTERS
Potential solutions: Sidechains or Interledger
blockstream.com interledger.org

60. @SDWOUTERS
“Blockchain could disrupt everything”

61. @SDWOUTERS
THE BLOCKCHAIN is an
inefficient database

62. Imagine a massive
decentralized Dropbox
synchronizing 24/7

63. But all these banks are investing in blockchains!

64. @SDWOUTERS
3 Immutability
5 Open innovation
1 Censorship resistance
2 Decentralization
4 Open access
Banks/governments won’t
replicate the BlockchainOpen
Editability 3
Centralization 4
Interoperability 1
Business innovation 5
Permissioned access 2
Private

65. @SDWOUTERS
When open blockchains solve privacy & scalability
companies may build services on them instead
Security Neutrality Development

66. @SDWOUTERS
Private blockchains may have
“use cases” like intranets do
The Blockchain
The Internet
“Private” Blockchains
Intranets

67. @SDWOUTERS
Private blockchains can
learn from Open ones
The Blockchain
The Internet
“Private” Blockchains
Intranets
Sidechains
Live environment

68. @SDWOUTERS
The open Blockchain
will create the most value
The Blockchain
The Internet
“Private” Blockchains
Intranets
>

69. samwouters.com
Speaker on Bitcoin & Blockchain
Digital Transformation Consultant
at Duval Union Consulting
sam.wouters@duvalunion.com
Sam Wouters
@sdwouters
WWW