Blockchain For Better②

Transcript

1. Blockchain For Better Version0.1 release
2. Sota Watanabe (2018) Student at Keio University, Japan Working at Chronicled Worked at SoftBank Robotics Chronicled is the first company to leverage IoT, AI, and Blockchain technologies to power end-to-end smart supply chain solutions I am a Blockchain Enthusiast. Contact : sota.watanabe.fbfs@gmail.com
5. I am not sure…but, something wrong. In this two years, I have been to 10 countries including US. I saw a lot of problems like poverty, disparity, discrimination, pollution, and so on. When I was in India, a child came up to me begging for money. He said “give me money”. Actually, it was my first experience to be told such a thing. I was shocked and I have been thinking the cause and solution since then. Today, my passion is to make a decentralized society where the edge has a power to change the world.
6. Let’s Fix the Internet. Today, the internet has many problems.
7. Why Does “Decentralization” Matter For ME? Power to the “Edge” and Get Closer Centralized / Administers manage the community. Peer to Peer system / People are connecting closer and closer
8. Some Examples Existing methods are terrible. • Taking long time • Corruption • Charge • Exploitation • More than 70% of world population
 doesn’t have a bank account • The people who really need money
 don’t have an access to financial
 services
9. The History of Technologies
10. Some Assumptions “10% of global GDP will be stored on Blockchains by 2025” World Economic Forum “As disruptive and important as the PC and the Internet” Mark Andreessen “The technology most likely to change the next decade of business is not the social web, cloud, robotics, or even artificial intelligence. It’s the blockchain.” Harbard Business Review “Gartner Group forecasts an accelerating takeoff for blockchain platforms. Blockchain is estimated to have delivered $4 billion in business value-add or technology innovation in 2017, with that growing to $21 billion by 2020, $176 billion in 2025 and $3.1 trillion by 2030, says Gartner.” Gartner Some Assumptions
11. Decentralized trust. That’s a big idea. When, in the history of humanity, 
 have we been able to execute this proposition? 
 Sure, perhaps in villages, but on a global scale? So let’s imagine a connected 
 global village—networked, rather—operating concurrently on a blockchain 
 system of global trust. For this to happen, this networked trusting village, 
 we must totally rethink our current economic systems, socio-political structures, norms, and mores. That sort of disruption, or shall we say metamorphosis, is not 
 only logistically complicated but also downright threatening to existing structures 
 and systems. So what does that mean for blockchain technology? -Sam Radocchia Co-founder at Chronicled, Forbes30 Under 30 List
12. My Prediction. Decentralized Trust. Post-Google Post-Apple Post-Facebook Post-Amazon Post-Microsoft Post-IBM Post-Twitter Post-Uber Post-Airbnb Every transaction will be based on the decentralized trust. But, how? There are both private blockchains and public blockchains. These blockchains are connected each other. ݱঢ়ɺνΣʔϯؒʹޓ׵ੑ͸ͳ͍͕ϓϩδΣΫτ͸ಈ͍͍ͯΔɻ
13. Network.
14. Sound Good? But, Welcome to Winter! Crypto/Blockchain bubble is coming because a gap between the expectation for technologies and the current status is huge.
15. Blockchain Has Still Many Technical Problems. Scalability Privacy Real time transaction Governance And so on.
16. Scalability Solutions. Bitcoin Ethereum Lightning Network Raiden Network Schnorr Sig Plasma SNARKs Sharding Segwit(2X) MAST
17. What is “Lightning Network”? Lightning Network is a protocol for scaling and speeding up blockchains. It was designed to solve some of the technical limitations of the Bitcoin blockchain, but could be implemented on top of any blockchain.
18. What is “Schenorr Sig”? ECDSA ପԁ҉߸ۂઢ෼͔Μͳ͍ͷͰ෼͔Δਓ ͍ͨΒڭ͍͑ͯͩ͘͞ɻ Planning to change the way of digital signature Advantages • Integrate multiple signatures 
 into a single signature • More than 40% data reduction
 might be possible Schenorr Sig A C B D
19. What is “Segwit(2X)”? At the first time, the ways by which we can overcome the scalability problems 
 are only “reducing a transaction data size” or “making a block size bigger”. So, what is the segwit2X ʲͪͳΈʹʳSchenorr Sigࣗମ͸΋ͱ΋ͱ͕͋ͬͨɺ ిࢠॺ໊Λ֨ೲ͢Δεϖʔεͷؔ܎͔Βಋೖʹ͸
 ϋʔυϑΥʔΫ͕ඞཁͩͬͨɻSegwitΛ͢Ε͹ిࢠॺ໊͸witnessʹ֨ೲ͞ΕΔͷͰιϑτϑΥʔΫͰࡁΉɻ
 ͔͠͠ɺSegwitͷಋೖʹ͸·ͩϋʔυϧ͕͋Δɻ
20. What is “MAST”? ϏοτίΠϯΛૹۚ͢Δͱ͖͸ɺʮA͔ΒBʹ1BTCૹۚ͢Δʯ ͱ͍͏୯७ͳऔҾ͚ͩͰͳ͘ʮB͕A͔Βͷ1BTCΛ10೔ؒड͚औΒͳ͔ͬͨΒɺ CͱD͕ड͚औΕΔʯͱ͍ͬͨগ͠ෳࡶͳऔҾΛߦ͏͜ͱ΋Մೳɻ
 ৚݅෼ذ͕͋ΔτϥϯβΫγϣϯͰ͸ॊೈʹૹۚͷڍಈΛઃఆ͢Δ͜ͱ͕Ͱ͖Δ͕ɺ ৚݅෼ذ͕ෳࡶʹͳΕ͹ͳΔ΄ͲτϥϯβΫγϣϯͷσʔλαΠζ͕େ͖͘ͳΔɻ MASTͱ͸τϥϯβΫγϣϯεΫϦϓτΛैདྷͱ͸ҟͳͬͨܗࣜͰอଘ͢Δٕज़ɻ ந৅ߏจ໦Ͱ৚݅෼ذͨ͠εΫϦϓτΛͦΕͧΕͷ৚݅Ͱ෼ׂ͠ɺ ϚʔΫϧ໦ͰશͯͷεΫϦϓτ͕ఏࣔ͞Εͳͯ͘΋͋Δ৚͕݅ͦͷεΫϦϓτʹؚ·Εͯ ͍Δ͔Ͳ͏͔֬ೝ͢Δ͜ͱ͕Ͱ͖Δɻ 
 
 

21. What is “Plasma”? Similer to state channel. However, the transactions are processed on plasma blockchains 
 instead of off-chains, and the transaction speed is increased. • Reducing the data which is preserved on Ethereaum blockchain. • Increasing the transaction speed.
22. What is “Sharding”? A F E D C B Miner Miner A→D B→E C→F A→D B→E C→F A F E D C B Miner Miner A→D C→F B→E ۃ୺ʹ͍͏ͱ͜Μͳײͩ͡ͱࢥ͍·͢ɻ
23. "You can verify the correctness of computations without 
 having to execute them and you will not even learn what was executed” ZK-SNARKs
24. Governance