セキュリティトークンの技術 / Security Token Technology

2020年2月12日、一般社団法人日本セキュリティトークン協会のセミナーにて使用したスライドです。

Transcript

1. JSTA / ks91@blockchainhub.co.jp — 2020-02-12 – p.1/24
2. https://speakerdeck.com/ks91 — 2020-02-12 – p.2/24
3. ( ) SFC CSO (Chief Science Officer) 1993 ( ) 2006 ( ) SFC 19 P2P (Peer-to-Peer) ( 9 ) 2011 2018 2019 ∼ 2019 ∼ REINVENT THE WORLD → ( ) — 2020-02-12 – p.3/24
4. Ethereum ERC20 — 2020-02-12 – p.4/24
5. Ethereum Ethereum ⇒ — 2020-02-12 – p.5/24
6. Ethereum Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART CONTRACT & DECENTRALIZED APPLICATION PLATFORM” (Dec. 2013∼) 15 (= ) = = ( ) CPU ⇒ DApps DApps = / — 2020-02-12 – p.6/24
7. = ( ) run = → — 2020-02-12 – p.7/24
8. Ether Ethereum EOA : Externally-Owned Account ( ) ( ) Ether ( ) EVM EVM = Ethereum = — 2020-02-12 – p.8/24
9. EVM : Ethereum Virtual Machine Gas ( EVM = ) → — 2020-02-12 – p.9/24
10. ERC20 — 2020-02-12 – p.10/24
11. ( , ) (constructor) (deploy) = ( ) ( ) ETH — 2020-02-12 – p.11/24
12. ERC20 ERC (Ethereum Request for Comment) 20 https://github.com/ethereum/EIPs/blob/master/EIPS/eip-20.md contract ERC20 { function totalSupply() constant returns (uint totalSupply); function balanceOf(address _owner) constant returns (uint balance); function transfer(address _to, uint _value) returns (bool success); function transferFrom(address _from, address _to, uint _value) returns (bool success); function approve(address _spender, uint _value) returns (bool success); function allowance(address _owner, address _spender) constant returns (uint remaining); event Transfer(address indexed _from, address indexed _to, uint _value); event Approval(address indexed _owner, address indexed _spender, uint _value); } name/ , symbol/ , decimals/ approve allowance ERC223 ( ), ERC721 (Non-Fungible) — 2020-02-12 – p.12/24
13. ERC20 ERC20 ( ) ⇒ ERC20 ( ERC20 ) ERC20 ⇒ — 2020-02-12 – p.13/24
14. (fungible) ERC20 → ERC223 (draft) or ERC777 (non-fungible) ERC721 ( ) (partially fungible) ERC1410 (draft) (ERC1400 ) — 2020-02-12 – p.14/24
15. ERC ERC1400 (draft) : Security Token Standard ERC20 ERC777 ERC1594 (draft) : Core Security Token Standard ( ) (KYC ) ERC1643 (draft) : Documnet Management Standard ERC1644 (draft) : Controller Token Standard ( ) ( ) ERC2258 (draft) : Custodial Ownership Standard ( ) ( ) — 2020-02-12 – p.15/24
16. — 2020-02-12 – p.16/24
17. ग़య
    
    ΢ΟΩϖσΟΞʮθϩ஌ࣝূ໌ʯ : ↑ 20 ( ) — 2020-02-12 – p.17/24
18. : ( 101 ) × ( ) — 2020-02-12 – p.18/24
19. ZoE (Zcash on Ethereum) Ethereum UTXO ( ) ( ) Ethereum Bitcoin Zcash zk-SNARKs Ethereum zk-SNARKs zk-STARKs 2017 Byzantium Gas — 2020-02-12 – p.19/24
20. zk-SNARKs Zero Knowledge - Succinct ( ) Non-interactive ARgument of Knowledge 3 G Generator, C circuit, λ : G(λ, C) → (pk, vk) C ; pk , vk P Prover, x C , w : P(pk, x, w) → π w witness, π proof V Verifier : V (vk, x, π) = true ⇒ ∃w : w C(x, w) V Ethereum G P — 2020-02-12 – p.20/24
21. C H H( ) C s (x, w) : x [H( ),H( ),H( )], w [ , ] ≥ w H x H( ) H( ) H( - ) H( ) C r (x, w) : x [H( ),H( ),H( )], w [ , ] w H x H( ) H( ) H( + ) H( ) — 2020-02-12 – p.21/24
22. ( ) , H( ), H( s ), H( r ) P π s , π r V (vk s , [H( s ), H( s ), H( )], π s ) V (vk r , [H( r ), H( r ), H( )], π r ) H( ) H( ) — 2020-02-12 – p.22/24
23. : ERC1400 — 2020-02-12 – p.23/24
24. — 2020-02-12 – p.24/24