TOP TEN OBSTACLES FOR DISTRIBUTED LEDGERS SARAH MEIKLEJOHN (UCL) - PowerPoint PPT Presentation

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TOP TEN OBSTACLES FOR DISTRIBUTED LEDGERS SARAH MEIKLEJOHN (UCL) TOP TEN OBSTACLES [ M 18] 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability

TOP TEN OBSTACLES FOR DISTRIBUTED LEDGERS SARAH MEIKLEJOHN (UCL)
TOP TEN OBSTACLES [ M 18] 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
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TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
MINING CENTRALIZATION
“Who makes the rules (i.e., governance) is at least as important as how the rules are enforced” Vili Lehdonvirta
GOVERNANCE CENTRALIZATION 12 Final Accepted 12 Replaced Draft 10 Active Final 10 Withdrawn Deferred Deferred 8 Number of IPs Number of IPs Proposed 8 BIP num allocated 6 Rejected 6 Draft 4 4 2 2 0 0 1 2 3 4 5 6 7 8 9 11 13 15 17 19 21 1 4 7 11 16 21 26 31 36 41 46 51 56 61 Participant ID Participant ID
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
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HOW TO COMPARE SOLUTIONS? opaque transparent centralized decentralized what is this distance? can we quantify it?
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
(image from Provenance report: https://www.provenance.org/tracking-tuna-on-the-blockchain)
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
DATA DATA CONSUMERS PRODUCERS (icons by parkjisun from noun project)
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
SCALABILITY 150GB and no end in sight!
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
RISKS OF ANONYMOUS PAYMENTS ONLINE DRUG SALES “CYCLE THEFT” THEFTS EXTORTION
FISTFUL OF BITCOINS [ M PJLMVS’13] mtgox instawallet satoshi dice btc dice silk road clone dice
REAL-WORLD BITCOIN TRACKING
IMPROVING ANONYMITY Approach 1: Design a standalone privacy-enhanced currency Approach 2: Design a privacy overlay for an existing currency centralized decentralized
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
SCALABILITY 30 EH/s (30 x 10 18 H/s) to achieve 7 tx/s!
SCALABILITY 30 EH/s (30 x 10 18 H/s) to achieve 7 tx/s! ↑ COMPUTATIONAL POWER ⇒ ↓ THROUGHPUT
TOP TEN OBSTACLES 10 Usability 9 Governance 8 Comparisons 7 Key Management 6 Agility 5 Interoperability 4 Scalability 3 Cost-Effectiveness 2 Privacy 1 Scalability
THANKS! ANY QUESTIONS?

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