匿名性通貨に関して気になったので素人がホワイトペーパーを読みながら追ってみました。Zerocashはいきなり取り掛かるにはかなりゴツいので、他の通貨から始めるのをおすすめします（笑） #blockchaintokyo

1.
@MasashiSalvador
2018/01/16 blockchain.tokyo#4 @Mercari

2. Who am I?
@MasashiSalvador
(Masashi Salvador Mitsuzawa)
🍵

3. -
- Zcash
- Zcash
-
- zcashd / zcash-cli
- Zcash
- Zcash White Paper

4. -
- trace
- /
- Mixing
- Ring Signature
- One-Time Address
- Zero Knowledge Proof
- Bitcoin
- traceability
😜
😜
👽
😆
🐰
👸

5. -
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- Blind Signature (

6. - : 2016/10/26 ~
- ZCash Company
- ZCash Foundation Zcash Protocol
https://github.com/ZcashFoundation/ZcashFoundation/blob/master/MISSION.md
- Protocol
- White Paper Protocol Spec
- Bitcoin 2100
-
- Proof of Work / EquiHash
- Bitcoin
- Scientific …

7. - >
(https://ja.wikipedia.org/wiki/ )
- :
- (
-
-
-

8. - bitcoin / Debian
- Installation
- Download Required Parameters
- testnet

9. - bitcoin / Debian
- Installation
- Download Required Parameters
- testnet

10. - bitcoin client
- Shield address /

11. - https://explorer.zcha.in
- ->
https://explorer.zcha.in/transactions/ad01194807f9f343f46125ef703742ea91be14c72c5277880a98b4e4a5a3f450
- ->
https://explorer.zcha.in/transactions/757b8ec048fc76a39c12813d5861df868e9036f98c13b4464b1662b55b09609e

12. - White Paper[2014]
- 6 Decentralized Anonimous Payment
1. user anonymity with fixed-value coins
2. compressing the list of coin commitments.
3. extending coins for direct anonymous payments.
4. sending coins.
key-private encryption scheme
5. public outputs.
6. non-malleability.

13. 1. user anonymity with fixed-value coins
🙆
statistically-hiding non-interactive commitment scheme
coin
2
🙆
1BTC pool deposit

14. 🐰 🙆
🙆
:
deposit 1BTC
White Paper …)
> the origin of the payment is anonymous.
🙆 🐰
:
🙆

15. 3. extending coins for direct anonymous payments
pseudorandom function (moreover collision-resistant)
address public key / address private key
🙆
address private key
🙆
coin
1 coin
🙆
🙆
🙆 coin
deposit

16. 3. extending coins for direct anonymous payments
🙆
address:
address:

17. -
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-
-
-

18. -
-
- …

19. -
- Zk-SNARK
-
-
- JoinSplit Transaction
- …
- ..
-
https://z.cash/blog/fixing-zcash-vulns.html

20. -
- Blog
- …