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1 マルチメディア, 分散, 協調とモバイル (DICOMO2016) シンポジウム 平成 28 年 7 月 Blockchain-LI: Activity-Based Micro-Pricing 1 1 Activity-Based Micro-Pricing / Bitcoin Blockchain-LI Activity-Based Micro-Pricing Blockchian-LI Blockchain-LI: A study on Implementing Activity-Based Micro-Pricing implementation using Crypto Currency Technologies YUKI YAMADA 1 TATSUO NAKAJIMA 1 1. Activity-Based Micro-Pricing [1] Activity-Based Micro-Pricing Activity- Based Micro-Pricing Bitcoin[2] Bitcoin P2P 1 Waseda University Activity-Based Micro-Pricing Bitcoin Bitcoin-NG[3] [4] Bitcoin Ethereum [5] Activity-Based Micro-Pricing 1497

2 2. Activity-Based Micro-Pricing 2.1 Activity-Based Micro-Pricing Activity-Based Micro-Pricing Activity- Based Micro-Pricing Activity-Based Micro-Pricing [1] Activity-Based Micro-Pricing 2.2 Micro-Pricing Activity-Based Micro-Pricing Bitcoin Bitcoin Bitcoin Bitcoin 3.1 Bitcoin P2P Bitcoin Bitcoin P2P P2P Proof-of-Work P2P Proof-of-Work Proof-of-Work 1498

3 Bitcoin Bitcoin P2P 3.2 Bitcoin Bitcoin Activity- Based Micro-Pricing Bitcoin Activity-Based Micro- Pricing Bitcoin 1 10 Activity-Based Micro-Pricing Proof-of-Work Proof-of-Work Bitcoin 7tps(transaction per second) 1 7 Bitcoin Bitcoin Bitcoin 10 Activity-Based Micro-Pricing Bitcoin Bitcoin Activity- Based Micro-Pricing Bitcoin Activity-Based Micro-Pricing Smart Contracts (Smart Contracts) (contract) Bitcoin 1997 Nick Szabo [6] Distributed Public Ledger (Distributed Public Ledger) Distributed Public Ledger Distributed Public Ledger Distributed Public Ledger Ethereum[7] 1499

4 4.3 Colored Coin Open Asset Protocol Colored Coin[8] Bitcoin Colored Coin Bitcoin Bitcoin Colored Coin Blockchain Blue Print for a New Economy[10] Colored Coin Bitcoin Colored Coin Open Asset Protocol[9] 5.2 Blockchain-LI Activity-Based Micro-Pricing Blockchain-LI Activity-Based Micro-Pricing 1 5. Blockchain-LI Activity-Based Micro- Pricing BLockchain-LI 3 Bitcoin Activity- Based Micro-Pricing Bitcoin Bitcoin Blockchain-LI Blockchain-LI 5.1 Activity-Based Micro-Pricing 1 Blockchain-LI Blockchain-LI A B A B B A 1500

5 B A A B A C A A 5.3 Blockchain-LI Activity-Based Micro-Pricing Bitcoin 6. Blockchain-LI 6.1 Blockchain-LI Bitcoin Bitcoin Blockchain-LI Blockchain-LI VISA 45000tps 1 4 VISA 2512 Bitcoin Bitcoin 1 300byte 1 60GB 21TB Bitcoin Activity-Based Micro-Pricing Blockchain-LI

6 6.2 Activity-Based Micro- Pricing Activity-Based Micro-Pricing Activity-Based Micro-Pricing Activity-Based Micro-Pricng Blockchain-LI 6.3 Blockchain-LI Activity-Based Micro-Pricing Activity-Based Micro-Pricing Micro-Pricing 1 Activity-Based Micro-Pricing P2P 6.5 Blockchain-LI Activity-Based Micro-Pricing Blockchain- LI 1502

7 Activity-Based Micro-Pricing Bitcoin P2P decentralized application platform. [Online] /05/04 [8] M Rosenfeld, Overview of colored coins. White paper, [9] Open Asset Protocol /05/04 [10] M Swan, Blockchain: Blueprint for a New Economy 2015, O Reilly 7. Activity-Based Micro-Pricing 2 Activity-Based Micro-Pricing [1] T Yamabe, V Lehdonvirta, H Ito, and H Soma, Applying pervasive technologies to create economic incentives that alter consumer behavior, Proceedings of the 11th International Conference on Ubiquitous Computing (Ubicomp 2009), [2] S Nakamoto, Bitcoin: A peer-to-peer electronic cash system, 2008 [Online] /05/03 [3] Eyal, Ittay, et al. Bitcoin-ng: A scalable blockchain protocol. arxiv preprint arxiv: (2015). [4] Distributed ledger technology: beyond block chain [Online] /05/07 [5] Delmolino, Kevin, et al. Step by Step Towards Creating a Safe Smart Contract: Lessons and Insights from a Cryptocurrency Lab. IACR Cryptology eprint Archive 2015 (2015): [6] N Szabo, Formalizing and Securing Relationships on Public Networks 1997 [Online] /05/04 [7] Ethereum: A next-generation smart contract and 1503

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