비트코인과 투명성 (bitcoin and transparency)

비트코인과 투명성 (Bitcoin and Transparency)

2014. 9. 30.

Prof. Sangkyu RhoGraduate School of Business

Seoul National University

Bitcoin

•  Future of money?

•  What is mining?

•  How can I use?

•  Anonymous?

10/12/14 2(CC BY-SA 3.0) Sangkyu Rho, SNU Business School

Future of Money?

Why Bitcoin?

•  Fully distributed and decentralized payment network – We are the bank! (Peer-‐to-‐peer network)

•  New paradigm of security and privacy – Trust by computaHon

•  PlaIorm for financial innovaHons –  Internet of Money

10/12/14 (CC BY-SA 3.0) Sangkyu Rho, SNU Business School 4

“We are the Bank!”

5

Miner

User

10/12/14 (CC BY-SA 3.0) Sangkyu Rho, SNU Business School

Organic Media Lab 2014

Trust By ComputaHon

•  Blockchain – The public ledger of bitcoin transacHons – hNp://blockchain.info

•  Proof of works – What miners do – To prevent bad guys from modifying blockchain

•  Public key encrypHon


Internet of Money

•  Mechanism to prevent double spending

•  New containers to store value

•  New ways to collaborate (distributed compuHng)

•  Open sourced


What is Mining?


Block



Bitcoin Mining: Proof of Work


Two Sides of Mining

•  To secure the blockchain –  If good guys > bad guys

•  To supply new Bitcoins – As awards to miners who first provide proof of work.


Virtuous Cycle of Bitcoin Mining


How Can I Use?


What you need to know

•  Bitcoin Exchange – Bitstamp, Mt. Gox (now bankrupt), … – Korbit

•  Bitcoin Wallet – Client: MulHbit – Service: Coinbase, Blockchain

•  Bitcoin TransacHons – Public key encrypHon – Digital signature


Bitcoin TransacHons



Bitcoin TransacHons

•  Bitcoin addresses are public keys

•  Bitcoin transacHons are digital signatures


What you have in your wallet?

•  Bitcoin?

•  EssenHally, private keys – Protect your wallet with a secure password – Backup your wallet data


Anonymous?


Bitcoin TransacHons in Blockchain



Bitcoin is a Link


Bitcoin is a Network


Bitcoin is a network



Bitcoin TransacHons are Pseudonymous

•  사적인 익명성 – No private informaHon is shared

•  공적인 투명성 – Every transacHon is traceable from beginning to end.


Bitcoin

•  More than digital money •  Much more transparent than we think •  DisrupHve innovaHon in financial industry (especially in payment)

•  InnovaHve way of mass collaboraHon in compuHng

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Recommended Readings •  노상규, “비트코인은 버블인가, 파괴적 혁신인가?,”

hNp://organicmedialab.com/2014/01/06/bitcoin-‐as-‐disrupHve-‐innovaHon/ •  윤지영, “연결이 지배하는 세상, 화폐의 필연적 진화,”

hNp://organicmedialab.com/2014/02/05/inevitable-‐evoluHon-‐of-‐money/ •  윤지영, “비트코인, 우리가 은행이다,”

hNp://organicmedialab.com/2014/02/22/we-‐are-‐a-‐bank-‐in-‐bitcoin/ •  노상규, “비트코인 채굴과 선순환 구조,”

hNp://organicmedialab.com/2014/01/11/virtuous-‐cycle-‐of-‐bitcoin-‐mining/ •  노상규, “비트코인 주소, 거래, 그리고 지갑,”

hNp://organicmedialab.com/2014/02/20/bitcoin-‐addresses-‐transacHons-‐and-‐wallets/

•  윤지영, 오가닉 미디어:연결이 지배하는 미디어 세상, 21세기북스, hNp://organicmedia.pressbooks.com, 2014.

•  Jerry Brito and Andrea CasHllo, Bitcoin: A Primer for Policymakers, Mercatus Center at George Mason University, 2013.

10/12/14 (CC BY-SA 3.0) Sangkyu Rho, SNU Business School

Any QuesHons?

E-‐mail: [email protected] Blog: www.organicmedialab.com

Facebook: sangkyu.rho LinkedIn: Sangkyu Rho TwiNer: @srho77

Who’s Sangkyu Rho? •  Profession:

–  서울대 경영대 교수 since 1995 –  서울대 경영대 MBA부학장 since 2013 –  Blogger since 2013

•  Interests: –  Data & Knowledge –  Social & Network

•  Contacts: –  [email protected] –  www.organicmedialab.com –  Facebook: sangkyu.rho –  TwiNer: @srho77


비트코인과 투명성 (bitcoin and transparency)

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