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DATA CONSUMERS DATA PRODUCERS
(icons by parkjisun from noun project)
TOP TEN OBSTACLES FOR DISTRIBUTED LEDGERS SARAH MEIKLEJOHN (UCL) - - PowerPoint PPT Presentation
TOP TEN OBSTACLES FOR DISTRIBUTED LEDGERS SARAH MEIKLEJOHN (UCL) - - PowerPoint PPT Presentation
TOP TEN OBSTACLES FOR DISTRIBUTED LEDGERS SARAH MEIKLEJOHN (UCL) DATA DATA CONSUMERS PRODUCERS (icons by parkjisun from noun project) DATA DATA CONSUMERS PRODUCERS (icons by parkjisun from noun project) TOP TEN OBSTACLES [ M 18] 10
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DATA CONSUMERS DATA PRODUCERS
(icons by parkjisun from noun project)
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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 [M18]
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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
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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
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CENTRALIZATION
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Vili Lehdonvirta
“Who makes the rules (i.e., governance) is at least as important as how the rules are enforced”
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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
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HOW TO COMPARE SOLUTIONS?
- paque
centralized transparent decentralized what is this distance? can we quantify it?
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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
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(image from Provenance report: https://www.provenance.org/tracking-tuna-on-the-blockchain)
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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
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DATA CONSUMERS DATA PRODUCERS
(icons by parkjisun from noun project)
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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
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SCALABILITY
150GB and no end in sight!
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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
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ONLINE DRUG SALES “CYCLE THEFT” THEFTS EXTORTION
RISKS OF ANONYMOUS PAYMENTS
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ONLINE DRUG SALES
HOW MUCH ANONYMITY DOES BITCOIN REALLY PROVIDE?
RISKS OF ANONYMOUS PAYMENTS
THEFTS EXTORTION “CYCLE THEFT”
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FISTFUL OF BITCOINS [MPJLMVS’13]
satoshi dice btc dice clone dice mtgox silk road instawallet
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REAL-WORLD BITCOIN TRACKING
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IMPROVING ANONYMITY
centralized decentralized
Approach 1: Design a standalone privacy-enhanced currency Approach 2: Design a privacy overlay for an existing currency
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MÖBIUS [MM’18]
anonymity availability theft msgs txs naïve
2 1 (tr)
TumbleBit
4 12
Coinjoin
n2 1 (r)
XIM
7* (r)
Möbius
2* 2 (s) decentralization with minimal coordination costs
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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
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SCALABILITY
16 EH/s (16 x 1018 H/s) to achieve 7 tx/s!
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SCALABILITY
16 EH/s (16 x 1018 H/s) to achieve 7 tx/s! ↑ COMPUTATIONAL POWER ⇒ ↓ THROUGHPUT
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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
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