本稿について
様々なブロックチェーンにインスピレーションを与えているプロトコルBitcoin-NG（Bitcoin Next Generation）の論文を見ていきます。本稿では「10. Conclusion」を見ます。
原文はこちらになります。
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今回のまとめ
- Bitcoin-NGは「コンセンサスレイテンシが単にネットワークの大きさのみに制限される」「スループットがノードの処理能力のみに制限される」というレベルでスケーリングが可能なプロトコルである。この技術はトラストレスなコンセンサスが必要な様々なアプリケーションを実現するブロックチェーンテクノロジに重要なものとなるだろう。
※以下、今回まとめた範囲の論文和訳になりますので詳細をご覧になりたい方は読み進めてください。
10. 結論
Bitcoinとその関連暗号通貨は驚くほどにポピュラーになったことで、スケーラビリティの限界に達してしまった。スケーラビリティを向上させる技術的な議論は、システムのパフォーマンス指標とセキュリティ目標との生来のトレードオフと理解されているものにより阻まれてきた。結果として議論は辛辣なものになり、長期的視野でのソリューションはうまく見つけられず、現在の関心は短期的、増補的、妥協的なソリューションに集まっている。
Bitcoin-NGはコンセンサスレイテンシが単にネットワークの大きさによって制限され、かつ、スループットのボトルネックがノードの処理能力のみに依存するというところまでブロックチェーンのスケーラビリティを向上させることができるということを示した。このようなスケーリングは決済、デジタルアセット取引、スマートコントラクトといった種々のアプリケーションのためのトラストレスなコンセンサスを実装することの有望さをグローバルスケールで満たすブロックチェーンテクノロジの実現に非常に重要なものである。
謝辞
著者一同、Ayush Dubey、Gregory Maxwell、Malte Möser、Weijia Song、本論文の世話役を務めてくれたJay Lorch、そして草稿にコメントをくれた匿名レビュアーに感謝を申し上げる。
参考文献
[1] ANDRESEN, G. O(1) block propagation. https://gist.github.com/gavinandresen/#file-blockpropagation-md, retrieved July. 2015.
[2] ASPNES, J. Randomized protocols for asynchronous consensus. Distributed Computing 16, 2-3 (2003), 165–175.
[3] BABAIOFF, M., DOBZINSKI, S., OREN, S., AND ZOHAR, A. On Bitcoin and red balloons. In ACM Conference on Electronic Commerce (Valencia, Spain, 2012), pp. 56–73.
[4] BACK, A., CORALLO, M., DASHJR, L., FRIEDENBACH, M., MAXWELL, G., MILLER, A., POELSTRA, A., TIMN, J., AND
WUILLE, P. Enabling blockchain innovations with pegged sidechains. http://cs.umd.edu/projects/coinscope/coinscope.pdf, 2014.
[5] BAMERT, T., DECKER, C., ELSEN, L., WATTENHOFER, R., AND WELTEN, S. Have a snack, pay with Bitcoins. In Peerto-Peer Computing (P2P), 2013 IEEE Thirteenth International Conference on (2013), IEEE, pp. 1–5.
[6] BELLARE, M., AND ROGAWAY, P. Random oracles are practical: A paradigm for designing efficient protocols. In Proceedings of the 1st ACM conference on Computer and communications security (1993), ACM, pp. 62–73.
[7] BITCOIN COMMUNITY. Bitcoin source. https://github.com/bitcoin/bitcoin, retrieved Mar. 2015.
[8] BITCOIN COMMUNITY. Protocol rules. https://en.bitcoin.it/wiki/Protocol_rules, retrieved Sep. 2013.
[9] BITCOIN COMMUNITY. Protocol specification. https://en.bitcoin.it/wiki/Protocol_specification, retrieved Sep. 2013.
[10] BLOCKTRAIL. BlockTrail API. https://www.blocktrail.com/api/docs#api_data, retrieved Sep. 2015.
[11] BONNEAU, J., MILLER, A., CLARK, J., NARAYANAN, A., KROLL, J. A., AND FELTEN, E. W. Research perspectives on
Bitcoin and second-generation cryptocurrencies. In Symposium on Security and Privacy (San Jose, CA, USA, 2015), IEEE.
[12] BUTERIN, V. A next generation smart contract & decentralized application platform. https://www.ethereum.org/pdfs/EthereumWhitePaper.pdf/, retrieved Feb. 2015, 2013.
[13] BUTERIN, V. Slasher: A punitive proof-of-stake algorithm. https://blog.ethereum.org/2014/01/15/slasher-a-punitive-proof-of-stake-algorithm/, January 2015.
[14] CNNMONEY STAFF. The Ashley Madison hack...in 2 minutes. http://money.cnn.com/2015/08/24/technology/ashley-madison-hack-in-2-minutes/, retrieved Sep. 2015.
[15] COINDESK. Bitcoin venture capital. http://www.coindesk.com/bitcoin-venture-capital/, retrieved Sep. 2015.
[16] COLORED COINS PROJECT. Colored Coins. http://coloredcoins.org/, retrieved Sep. 2015.
[17] CORALLO, M. High-speed Bitcoin relay network. http://sourceforge.net/p/bitcoin/mailman/message/31604935/, November 2013.
[18] DECKER, C., AND WATTENHOFER, R. Information propagation in the Bitcoin network. In IEEE P2P (Trento, Italy, 2013).
[19] DECKER, C., AND WATTENHOFER, R. A fast and scalable payment network with Bitcoin Duplex Micropayment Channels. In Stabilization, Safety, and Security of Distributed Systems - 17th International Symposium, SSS 2015, Edmonton, AB, Canada, August 18-21, 2015, Proceedings (2015), Springer, pp. 3–18.
[20] DWORK, C., LYNCH, N. A., AND STOCKMEYER, L. J. Consensus in the presence of partial synchrony. J. ACM 35, 2 (1988), 288–323.
[21] EYAL, I. The miner’s dilemma. In IEEE Symposium on Security and Privacy (2015), pp. 89–103.
[22] EYAL, I., BIRMAN, K., AND VAN RENESSE, R. Cache serializability: Reducing inconsistency in edge transactions. In 35th IEEE International Conference on Distributed Computing Systems (2015), pp. 686–695.
[23] EYAL, I., GENCER, A. E., SIRER, E. G., AND VAN RENESSE, R. Bitcoin-ng: A scalable blockchain protocol. arXiv preprint arXiv:1510.02037 (2015).
[24] EYAL, I., AND SIRER, E. G. Bitcoin is broken. http://hackingdistributed.com/2013/11/04/bitcoin-is-broken/, 2013.
[25] EYAL, I., AND SIRER, E. G. Majority is not enough: Bitcoin mining is vulnerable. In Financial Cryptography and Data Security (2014).
[26] GARAY, J. A., KIAYIAS, A., AND LEONARDOS, N. The Bitcoin backbone protocol: Analysis and applications. In Advances in Cryptology - EUROCRYPT 2015 - 34th Annual International Conference on the Theory and Applications of Cryptographic Techniques (2015), pp. 281–310.
[27] GARCIA-MOLINA, H. Elections in a distributed computing system. Computers, IEEE Transactions on 100, 1 (1982), 48–59.
[28] HEARN, M., AND SPILMAN, J. Rapidly-adjusted (micro)payments to a pre-determined party. https://en.bitcoin.it/wiki/Contract, retrieved Sep. 2015.
[29] HEILMAN, E., KENDLER, A., ZOHAR, A., AND GOLDBERG, S. Eclipse attacks on Bitcoin’s peer-to-peer network. In 24th USENIX Security Symposium, USENIX Security 15, Washington, D.C., USA, August 12-14, 2015. (2015), pp. 129–144.
[30] KARAME, G. O., ANDROULAKI, E., AND CAPKUN, S. Doublespending fast payments in bitcoin. In Proceedings of the 2012 ACM Conference on Computer and Communications Security (2012), CCS ’12, ACM, pp. 906–917.
[31] KOSBA, A., MILLER, A., SHI, E., WEN, Z., AND PAPAMANTHOU, C. Hawk: The blockchain model of cryptography and privacy-preserving smart contracts. Cryptology ePrint Archive, Report 2015/675, 2015. http://eprint.iacr.org/.
[32] KROLL, J. A., DAVEY, I. C., AND FELTEN, E. W. The economics of Bitcoin mining or, Bitcoin in the presence of adversaries. In Workshop on the Economics of Information Security (2013).
[33] LAMPORT, L. Using time instead of timeout for fault-tolerant distributed systems. ACM Transactions on Programming Languages and Systems 6, 2 (Apr. 1984), 254–280.
[34] LE LANN, G. Distributed systems-towards a formal approach. In IFIP Congress (1977), vol. 7, Toronto, pp. 155–160.
[35] LEWENBERG, Y., BACHRACH, Y., SOMPOLINSKY, Y., ZOHAR, A., AND ROSENSCHEIN, J. S. Bitcoin mining pools: A cooperative game theoretic analysis. In Proceedings of the 2015 International Conference on Autonomous Agents and Multiagent Systems (2015), International Foundation for Autonomous Agents and Multiagent Systems, pp. 919–927.
[36] LEWENBERG, Y., SOMPOLINSKY, Y., AND ZOHAR, A. Inclusive block chain protocols. In Financial Cryptography (Puerto Rico, 2015).
[37] LITECOIN PROJECT. Litecoin, open source P2P digital currency. https://litecoin.org, retrieved Nov. 2014. USENIX Association 13th USENIX Symposium on Networked Systems Design and Implementation (NSDI ’16) 59
[38] MEIKLEJOHN, S., POMAROLE, M., JORDAN, G., LEVCHENKO, K., MCCOY, D., VOELKER, G. M., AND SAVAGE, S. A fistful of bitcoins: characterizing payments among men with no names. In Proceedings of the 2013 Internet Measurement Conference, IMC 2013, Barcelona, Spain, October 23-25, 2013 (2013), pp. 127–140.
[39] MILLER, A., AND JANSEN, R. Shadow-Bitcoin: Scalable simulation via direct execution of multi-threaded applications. IACR Cryptology ePrint Archive 2015 (2015), 469.
[40] MILLER, A., AND JR., L. J. J. Anonymous Byzantine consensus from moderately-hard puzzles: A model for Bitcoin. https://socrates1024.s3.amazonaws.com/consensus.pdf, 2009.
[41] MILLER, A., LITTON, J., PACHULSKI, A., GUPTA, N., LEVIN, D., SPRING, N., AND BHATTACHARJEE, B. Preprint: Discovering Bitcoins public topology and influential nodes. http://cs.umd.edu/projects/coinscope/coinscope.pdf, 2015.
[42] MORARU, I., ANDERSEN, D. G., AND KAMINSKY, M. Egalitarian Paxos. In ACM Symposium on Operating Systems Principles (2012).
[43] NAKAMOTO, S. Bitcoin: A peer-to-peer electronic cash system. http://www.bitcoin.org/bitcoin.pdf, 2008.
[44] NAYAK, K., KUMAR, S., MILLER, A., AND SHI, E. Stubborn mining: Generalizing selfish mining and combining with an eclipse attack. IACR Cryptology ePrint Archive 2015 (2015), 796.
[45] PAZMINO˜ , J. E., AND DA SILVA RODRIGUES, C. K. Simply dividing a Bitcoin network node may reduce transaction verification time. The SIJ Transactions on Computer Networks and Communication Engineering (CNCE) 3, 2 (February 2015), 17–21.
[46] PEASE, M. C., SHOSTAK, R. E., AND LAMPORT, L. Reaching agreement in the presence of faults. J. ACM 27, 2 (1980), 228–234.
[47] PECK, M. E. Adam Back says the Bitcoin fork is a coup. http://spectrum.ieee.org/tech-talk/computing/networks/the-bitcoin-for-is-a-coup, Aug 2015.
[48] POON, J., AND DRYJA, T. The Bitcoin Lightning Network. http://lightning.network/lightning-network.pdf, February 2015. Draft 0.5.
[49] SAPIRSHTEIN, A., SOMPOLINSKY, Y., AND ZOHAR, A. Optimal selfish mining strategies in Bitcoin. CoRR abs/1507.06183 (2015).
[50] SCHNEIDER, F. B. Implementing fault-tolerant services using the state machine approach: A tutorial. ACM Computing Surveys 22, 4 (Dec. 1990), 299–319.
[51] SOMPOLINSKY, Y., AND ZOHAR, A. Accelerating Bitcoin’s transaction processing. fast money grows on trees, not chains. In Financial Cryptography (Puerto Rico, 2015).
[52] SOMPOLINSKY, Y., AND ZOHAR, A. Secure high-rate transaction processing in Bitcoin. In Financial Cryptography and Data Security - 19th International Conference, FC 2015, San Juan, Puerto Rico, January 26-30, 2015, Revised Selected Papers (2015), pp. 507–527.
[53] STATHAKOPOULOU, C. A faster Bitcoin network. Tech. rep., ETH, Zurich, January 2015. Semester Thesis, supervised by C. Decker and R. Wattenhofer.
[54] SWANSON, E. Bitcoin mining calculator. http://www.alloscomp.com/bitcoin/calculator, retrieved Sep. 2013.
[55] THE BITCOIN COMMUNITY. Release notes, bitcoin 0.12.0. https://github.com/bitcoin/bitcoin/blob/0.12/doc/release-notes.md, Feb 2012.
[56] THE ETHEREUM COMMUNITY. Ethereum white paper. https://github.com/ethereum/wiki/wiki/White-Paper, retrieved July. 2015.
[57] WIKIPEDIA. List of cryptocurrencies. https://en.wikipedia.org/wiki/List_of_cryptocurrencies, retrieved Oct. 2013.
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