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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. 2016
    SFC
    [email protected]
    – 2016-11-25 – p.1/17

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  2. ( ) ([email protected])
    SFC ( )
    CSO (Chief Science Officer)
    1988∼1997 ( )
    1993 M.Eng (CS)
    2006 ( )
    SFC
    15 P2P

    – 2016-11-25 – p.2/17

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  3. – 2016-11-25 – p.3/17

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  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

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  5. P2P
    ( )
    (double spending)
    ⇒ ( )
    ( )
    – 2016-11-25 – p.5/17

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

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

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  8. – 2016-11-25 – p.8/17

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  9. (Hyperledger )
    ( )
    ( )
    ( )
    IoT
    /
    / ( )
    – 2016-11-25 – p.9/17

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

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  11. vs.
    – 2016-11-25 – p.11/17

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  12. – 2016-11-25 – p.12/17

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  13. The DAO ( )
    The DAO
    Split ( )
    360 ETH (50∼60 ) (6/17)
    ( )
    ( ; )
    (7/20 )
    – 2016-11-25 – p.13/17

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  14. :

    – 2016-11-25 – p.14/17

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  15. 3
    1. ( )
    ⇒ ( )
    2.
    ( )

    3. ( )
    TX

    – 2016-11-25 – p.15/17

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  16. Satoshi Nakamoto



    ← “OP_RETURN”

    – 2016-11-25 – p.16/17

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  17. ( )

    ( )
    – 2016-11-25 – p.17/17

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