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Page 1: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Blockchain Technology

Page 2: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 3: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 4: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Double-Spending Problem

Page 5: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 6: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 7: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Blockchain vs. Crypto

Page 8: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Decentralization

Page 9: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 10: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 11: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 12: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 13: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 14: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 15: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 16: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 17: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 18: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Nonce

Page 19: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 20: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Demonstration

Page 21: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 22: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 23: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Addresses

Page 24: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 25: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

1Bv8dN7pemC5N3urfMDdAFReibefrBqCaK

Page 26: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

e9873d79c6d87dc0fb6a5778633389f4453213303da61f20bd67fc233aa33262

Page 27: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

2256

Page 28: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

directory.io

Page 29: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 30: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 31: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Security

Page 32: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

51% attack

Page 33: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Mining: Proof of Work

Page 34: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 35: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 36: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 37: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 38: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 39: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Smart Contracts

Page 40: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 41: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 42: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Decentralized Applications (DApps)

Page 43: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 44: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 45: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Tokens: Usage Token vs. Work Token

Page 46: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 47: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow
Page 48: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Private Blockchains

Page 49: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Restrict Mining and/or Access

Page 50: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

ImmunoTracker

Page 51: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Amazon: Supply Chain, Proof-of-Provenance

Page 52: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Electronic Voting

Page 53: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

How to get started?

Page 54: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Explore the Technology

Page 55: Blockchain Technology - CS50 · Bitcoin: A Peer-to-Peer Electronic Cash System Satoshi Nakamoto satoshin@gmx.com Abstract. A purely peer-to-peer version of electronic cash would allow

Bitcoin: A Peer-to-Peer Electronic Cash System · 2 Bitcoin: A Peer-to-Peer Electronic Cash System Abstract. A purely peer-to-peer version of electronic cash would allow online payments

Peer-to-peer Electronic Cash Using Identity Based Signcryptionof e-cash at the time of transaction. An annual survey from Indonesia Internet Service Provider Association (APJII) in

YOW 2016 How the Bitcoin Protocol Actually Works · • White paper published November 2008 by Satoshi Nakamoto “Bitcoin: A Peer-to-Peer Electronic Cash System” “I've been working

FruitChains - ETH ZReferences •Bitcoin / Blockchain •Nakamoto, Bitcoin: A peer-to-peer electronic cash system (2008)•Pass, Seeman, Shelat, Analysis of the blockchain protocol

A Peer-to-Peer Electronic Cash System Jungho Bang ...manosk/assets/slides/w18/bitcoin.pdf · A system for electronic transaction without relying on trust Decentralized, distributed,

Conceptual and methodological issues in comparative ... · Conceptual and methodological issues in comparative neuroscience & psychology: a reassessment Willemet R. [email protected]

CIO Insights Reflections: Cryptocurrencies and blockchains ... · Bitcoin in a whitepaper called “Bitcoin: A Peer-to-Peer Electronic Cash System”. •During its first few years

Liquidity matters - C2FO...Invoice financing (SCF or factoring or invoice discounting) Cash flow from operations Private funding Peer-to-peer lending France Germany Italy UK US Total

The International Dimension [email protected] Chris Souvlis INTERNATIONAL LINKS & PROJECTS Southwark/ Southend

Blockchain Technology and Applicationssolutions.ait.ac.th/.../2018/07/Dr.-Chutiporn_Intro... · source: Bitcoin: A Peer-to-peer Electronic Cash System 3 Traditional online financial

BITCOIN E BLOCKCHAIN - Dataprevportal.dataprev.gov.br/sites/default/files/arquivos/apresentacao... · A purely peer-to-peer version of electronic cash would allow onlinepayments to

OVERVIEW OF MOBILE FINANCIAL SERVICES DATA IN THE … · 2018-05-25 · Cash-in, cash-out, peer-to-peer transfers and top-ups are the major mobile financial services Graph 9 : Mobile

Advanced Network Security -. Bitcoin · On Bitcoin lBitcoin: the paper – Satoshi Nakamoto, 2008 –Bitcoin: A Peer-to-Peer Electronic Cash System lBitcoin: the system –A trustless

The Target Cash Buffer - World Bankpubdocs.worldbank.org/pubdocs/publicdoc/2015/9/361801442253296095/...The Target Cash Buffer ... under the Government Bond Market Peer Group Dialogue

Peer to peer electronic cash system for instant transaction · 2019-08-02 · currency and is the first currency which is a decentralised & have autonomous system. FuturoCoins exceptional

Bitcoin Proof of Stake: A Peer-to-Peer Electronic Cash System · 4.2 Bitcoin PoW Mining Hardware Centralization The centralization of Bitcoin mining around Chinese regions is only

Qtum New Whitepaper New Whitepaper... · 2020. 4. 13. · On October 31, 2008, Satoshi Nakamoto published the first Bitcoin white paper, "Bitcoin: A Peer-to-Peer Electronic Cash

Blockchain – Operator Opportunities · blockchain in the whitepaper “Bitcoin: A Peer-to-Peer Electronic Cash System” (Nakamoto, 2008) [1]. Bitcoin is an example of the first

Blockchain 101 · 2018. 4. 1. · Bitcoin • Introduced in 2008 by Satoshi Nakamoto • Bitcoin: A Peer-to-Peer Electronic Cash System • No financial institution • Open source

Defining World-Class Cash Management: Part I - · PDF fileDefining World-Class Cash Management: Part I. ... Peer Knowledge Exchange The NeuGroup ... are able to benchmark their treasury

4/19/2019 bitcoinSatoshi Nakamoto [email protected] Abstract. A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another

Independently peer reviewed paper - Glass Propertiesglassproperties.com/resistivity/ElectrResist_GlassMelts_2005.pdf · - December 2007 - [email protected] 1 Electrical Resistivity

An Analysis of the Bitcoin Electronic Cash System · The most successful and widely used of these services is Bitcoin { a decentralized peer-to-peer electronic cash system. This paper

AJM Sports Platform · 2. Project Background “A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without

UsingBlockchainforPeer-to-Peer Proof-of-LocationBitcoin: A peer-to-peer electronic cash system. . org/bitcoin.pdf,2008. 13 Zhichao Zhu and Guohong Cao. Toward privacy preserving and

Investing in a new asset class: Cryptocurrency · The origin of Bitcoin - 2009 •“Satoshi Nakamoto” whitepaper •Bitcoin: A Peer-to-Peer Electronic Cash System •Unknown identity

Cash-Flow Based Dynamic Inventory Managementjshi/Shi_Katehakis_Melamed_May_2013... · 2013-05-05 · Cash-Flow Based Dynamic Inventory Management (Authors’ names blinded for peer

DIGITAL CASH - Positive Moneypositivemoney.org/wp-content/uploads/2016/01/Digital_Cash_WebPrin… · Positive Money Digital Cash 2 the borrower. But when a peer-to-peer lending firm

Delft University of Technology Blockchain in government ... · On the 31st of October 2008 the white paper “Bitcoin – A Peer-to-Peer Electronic Cash System” by a mysterious

BOSAGORA White Paper · 2020-05-07 · Background The blockchain was first conceptualized in Satoshi Nakamoto’s white paper “Bitcoin: A Peer-to-Peer Electronic Cash System“

A Peer-to-Peer Electronic Cash System for Instant · PDF fileAbstract: Bitcoin and other cryptocurrencies use a distributed network and database system called the blockchain to acquire

Modeling and Verification of the Bitcoin Protocol · Bitcoin is a popular digital currency for online payments, realized as a decentralized peer-to-peer electronic cash system. Bitcoin

ADCA Blockchain presentation locations... · 5/8/2019  · Bitcoin & Blockchain • “Peer‐to‐peer electronic cash that allows online payments to be sent directly from one party

Blockchain: Fundamentals & Opportunities › wp-content › uploads › 2018 › 10 › ... · future general uses ... • “Bitcoin: A Peer-to-Peer Electronic Cash System”

Scuola di Economia e Management Thesis DEEP LEARNING …veeenu.github.io/thesis-msc.pdf · 2020. 5. 26. · Bitcoin: A Peer-to-Peer Electronic Cash System (Satoshi Nakamoto, 2008)