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  

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“We  are  the  Bank!”

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Miner

User

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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  

10/12/14 (CC BY-SA 3.0) Sangkyu Rho, SNU Business School 6

Internet  of  Money  

•  Mechanism  to  prevent  double  spending  

•  New  containers  to  store  value  

•  New  ways  to  collaborate  (distributed  compuHng)  

•  Open  sourced  

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What  is  Mining?  

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Block  

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Organic Media Lab 2014

Bitcoin  Mining:  Proof  of  Work  

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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.  

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Virtuous  Cycle  of  Bitcoin  Mining  

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How  Can  I  Use?  

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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  

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

Bitcoin  TransacHons  

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Organic Media Lab 2014

Bitcoin  TransacHons  

•  Bitcoin  addresses  are  public  keys  

•  Bitcoin  transacHons  are  digital  signatures  

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What  you  have  in  your  wallet?  

•  Bitcoin?  

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

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Anonymous?    

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Bitcoin  TransacHons  in  Blockchain  

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Organic Media Lab 2014

Bitcoin  is  a  Link  

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Bitcoin  is  a  Link  

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Organic Media Lab 2014

Bitcoin  is  a  Network  

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Bitcoin  is  a  network  

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Organic Media Lab 2014

Bitcoin  TransacHons  are  Pseudonymous  

•  사적인 익명성  – No  private  informaHon  is  shared  

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

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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:  srho@snu.ac.kr  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:    –  srho@snu.ac.kr  –  www.organicmedialab.com    –  Facebook:  sangkyu.rho  –  TwiNer:  @srho77  

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