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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

Kenji Saito
November 25, 2016

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

November 25, 2016
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  1. ( ) ([email protected]) SFC ( ) CSO (Chief Science Officer)

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

    – 2016-11-25 – p.5/17
  4. ( ) 1. 10 ( ) 2. 3. 1 –

    2016-11-25 – p.6/17
  5. (Hyperledger ) ( ) ( ) ( ) IoT /

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

    : – 2016-11-25 – p.10/17
  7. The DAO ( ) The DAO Split ( ) 360

    ETH (50∼60 ) (6/17) ( ) ( ; ) (7/20 ) – 2016-11-25 – p.13/17
  8. 3 1. ( ) ⇒ ( ) 2. ( )

    ⇒ 3. ( ) TX ⇒ – 2016-11-25 – p.15/17