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PoRT 脈絡 - Coggle Diagram
PoRT 脈絡
Experiment
Scale
Performance
Content Size
Fairness, Nissim Francez. Fairness. Texts and Monographs in Computer Science. Springer, 1986
Selection Fairness
fairness voting committees
SBFT
RedBelly
PeerCensus
Hyperledger Fabric
ByzCoin
Tendermint
Reward mechanism
Distributed Ledger Technology
“Who” will record the ledger information?
Consensus Mechanism
Find a "unique" result
Competition
Permissionless
Proof-of-stake,
Ethereum 2.0 2022
Fast track
Proof-of-work, Bitcoin 2007
Waste energy
Sybil attack Resistance
最先算出的贏,難度固定但算出的概率是隨機的,符合人人可以參與的目標
要贏(增加概率)就需要資源集中不分散,難以開多個分身
Assign
Permissioned (PKI for identity registration & authentication)
Proof-of-authority
Clique for Geth
類似 round-robin
Aura (Authority Round) for Parity
id I = s (同步時間/出塊時間) mod N
廣義定義: Node Hierarchy Committee-based
狹義定義: Committee-based = permissionless+classical state-machine (like PBFT)
Committee-based by deterministic VRF (Random Selection) + classical state machine (like SBFT)
PoRT
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PoW(選/資格審核)+PBFT(執行), Hybrid blockchain 2017
A fair selection protocol, 2020
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久沒更新,可能會汙染失去安全性或故障導致效能降低
Permisssioned
Committee-based by voting or delegated, EOS 2018
符合、取得某種條件,獲得候選資格成為代理
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擁有投票權,並選出適任者
Participation Model (Node topology)
Decentralized or All
Node Hierarchy (At least two layers)
TTP
Big brother issues
DDoS attack
Individuals
保存不易
“How” to access the results?
Data structures
Block
Hash
Dirty bits
Merkle Patricia Tries (MPT)
Signature
Storage Designn
IPFS
STSM
Initialization and Extension Design
Incentive bootstrapping
Security