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MimbleWimble隱私協議以及其實作 - 賴佳祈
由於場地問題,第二天我們移動到另一棟大樓啦!議程教室變動請見網站上的議程表。
歡迎來到 https://hackmd.io/@coscup/2019 共筆
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MimbleWimble 協議
Confidential Transaction 機密交易
Pedersen commitment
C = v*H + r*G
v
: 交易金額r
: 致盲因子(私密金鑰)加法同態:先加密再相加 = 先相加再加密
C1 + C2 = (v1*H + r1*G) + (v2*H + r2*G) = (v1+v2)*H + (r1+r2)*G
Range Proofs
10 = 15 + (-5),導致可以
Alice 有 10 Grin,給 Bob -5 Grin,找回 15 Grin
,因此需要 range proof 證明所有輸入都大於 0CoinJoin
Onw-Way Aggregate Signatures (OWAS) 單向聚合簽名
Sum(outputs) - Sum(inputs) = Kernel_excess + kernel_offset
X*G = X1*G + X2*G
Cut-through
輸入輸出相同部份可以不儲存,減少佔用儲存空間
Grin
MimbleWimble 協議的實現,加上 IP 隱藏
Dandelion 蒲公英協議
挖礦演算法:Cuckoo cycle
tags:
COSCUP2019
Blockchain and Distributed Ledger
IB502