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ブロックチェーンの基礎とその可能性・不可能性 / Basics of Blockchains, Their Possibilities and Impossibilities

ブロックチェーンの基礎とその可能性・不可能性 / Basics of Blockchains, Their Possibilities and Impossibilities

2016年11月25日(金)、大阪にて開催された「パナソニック総合技術シンポジウム」にて講演した際のスライドです。

Kenji Saito
PRO

November 25, 2016
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  1. 2016 SFC ks91@sfc.wide.ad.jp – 2016-11-25 – p.1/17

  2. ( ) (ks91@sfc.wide.ad.jp) SFC ( ) CSO (Chief Science Officer)

    1988∼1997 ( ) 1993 M.Eng (CS) 2006 ( ) SFC 15 P2P ⇒ – 2016-11-25 – p.2/17
  3. – 2016-11-25 – p.3/17

  4. ( ) ( ) ← (TX) (TX) ← ( :

    ) ( ) “A timestamp server works by taking a hash of a block of items to be timestamped and widely publishing the hash, such as in a newspaper or Usenet post” “To implement a distributed timestamp server on a peer-to-peer basis, we will need to use a proof-of-work system similar to Adam Back’s Hashcash, rather than newspaper or Usenet posts” – Satoshi Nakamoto (2008) – 2016-11-25 – p.4/17
  5. P2P ( ) (double spending) ⇒ ( ) ( )

    – 2016-11-25 – p.5/17
  6. ( ) 1. 10 ( ) 2. 3. 1 –

    2016-11-25 – p.6/17
  7. End-to-End ( ) ( ) – 2016-11-25 – p.7/17

  8. – 2016-11-25 – p.8/17

  9. (Hyperledger ) ( ) ( ) ( ) IoT /

    / ( ) – 2016-11-25 – p.9/17
  10. : . . . : Proof of Existence ( )

    : – 2016-11-25 – p.10/17
  11. vs. – 2016-11-25 – p.11/17

  12. – 2016-11-25 – p.12/17

  13. The DAO ( ) The DAO Split ( ) 360

    ETH (50∼60 ) (6/17) ( ) ( ; ) (7/20 ) – 2016-11-25 – p.13/17
  14. : ⇒ – 2016-11-25 – p.14/17

  15. 3 1. ( ) ⇒ ( ) 2. ( )

    ⇒ 3. ( ) TX ⇒ – 2016-11-25 – p.15/17
  16. – Satoshi Nakamoto ⇓ ← ⇑ ← “OP_RETURN” ⇒ –

    2016-11-25 – p.16/17
  17. ( ) ⇒ ( ) – 2016-11-25 – p.17/17