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2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)最新文献

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Usability and Security Analysis of the KeepKey Wallet KeepKey钱包的可用性和安全性分析
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751451
E. Almutairi, Shiroq Al-Megren
{"title":"Usability and Security Analysis of the KeepKey Wallet","authors":"E. Almutairi, Shiroq Al-Megren","doi":"10.1109/BLOC.2019.8751451","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751451","url":null,"abstract":"This paper presents an investigation of the usability and security of the hardware wallet KeepKey 4.2.10. A Man-in-the-Middle (MITM) attack was implemented to simulate potential attacks and evaluate its implications for the wallet’s security. In the usability study, ten participants were observed as they used the wallet to complete various Bitcoin address comparison and confirmation tasks. Furthermore, the study examined users’ sentiments towards the transaction process of the KeepKey wallet. The results illustrate that the majority of the participants could detect some but not all MITM attacks. Moreover, there were a considerable number of successful MITM attacks in the experiment. From a usability perspective, our findings show that the Keepkey system has some usability issues that should be tackled to enhance the usability and the security of the wallet.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130352750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Visualising Bitcoin’s Dynamic P2P Network Topoogy and Performance 可视化比特币的动态P2P网络拓扑和性能
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751305
Meryam Essaid, Se Jin Park, Hongtaek Ju
{"title":"Visualising Bitcoin’s Dynamic P2P Network Topoogy and Performance","authors":"Meryam Essaid, Se Jin Park, Hongtaek Ju","doi":"10.1109/BLOC.2019.8751305","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751305","url":null,"abstract":"In massive, dynamic and distributed P2P networks like Bitcoin, where thousands of updates occur per second, it is hard to obtain an accurate topology representing the structure of the network as a graph with nodes and links by using the traditional local measurement approaches based on batches, offline data, or on the discovery of the topology around a small set of nodes and then combine them to discover an approximate network topology. All of which present some limitation when applying them on blockchain-based networks. In this paper, we propose a topology discovery system, which performs a real-time data collection and analysis for Bitcoin P2P links with the use of a customized version of the Page-Rank algorithm that assembles incoming nodes information for deeper graph analysis processing. The topology discovery system allows us to gain knowledge on the Bitcoin network size, the network stability in term of well-connected Bitcoin nodes, as well as some data regarding the Bitcoin nodes geolocation.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116119986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Digitizing Invoice and Managing VAT Payment Using Blockchain Smart Contract 使用区块链智能合约实现发票数字化和增值税支付管理
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751256
Van Nguyen, H. Pham, T. Tran, Huu-Thuan Huynh, Y. Nakashima
{"title":"Digitizing Invoice and Managing VAT Payment Using Blockchain Smart Contract","authors":"Van Nguyen, H. Pham, T. Tran, Huu-Thuan Huynh, Y. Nakashima","doi":"10.1109/BLOC.2019.8751256","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751256","url":null,"abstract":"Nowadays, the authenticating procedure for transactions is still complicated, and the current Value-Added Tax (VAT) administration system works as centralized server, which consists of high-risk attacks from hackers. Therefore, only a few countries use digital technologies to calculate and manage the VAT payment despite of their benefits. In this paper, by combining decentralized storage network (DSN) with the smart contract (SC), we propose a new model based on Blockchain technology to authenticate the transaction, calculate Value-Added Tax and approve VAT payment. This system runs in a host computer (host PC) for encrypting and decrypting data. The smart contract is implemented in Remix Integrated Development Environment (IDE) based on the Ethereum platform. Experiential results show that the new model not only saves the cost for authenticating transactions but also protects the data from hacker’s attacks due to consensus property of the Blockchain technology.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"431 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125758182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 18
Dispute Resolution for Smart Contract-based Two-Party Protocols 基于智能合约的双方协议争议解决
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751312
Eric Wagner, Achim Völker, Frederik Fuhrmann, Roman Matzutt, Klaus Wehrle
{"title":"Dispute Resolution for Smart Contract-based Two-Party Protocols","authors":"Eric Wagner, Achim Völker, Frederik Fuhrmann, Roman Matzutt, Klaus Wehrle","doi":"10.1109/BLOC.2019.8751312","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751312","url":null,"abstract":"Blockchain systems promise to mediate interactions of mutually distrusting parties without a trusted third party. However, protocols with full smart contract-based security are either limited in functionality or complex, with high costs for secured interactions. This observation leads to the development of protocol-specific schemes to avoid costly dispute resolution in case all participants remain honest. In this paper, we introduce SmartJudge, an extensible generalization of this trend for smart contract-based two-party protocols. SmartJudge relies on a protocol-independent mediator smart contract that moderates two-party interactions and only consults protocol-specific verifier smart contracts in case of a dispute. This way, SmartJudge avoids verification costs in absence of disputes and sustains interaction confidentiality among honest parties. We implement verifier smart contracts for cross-blockchain trades and exchanging digital goods and show that SmartJudge can reduce costs by 46–50% and 22% over current state of the art, respectively.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"345 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115292210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 20
BlockSIM: A practical simulation tool for optimal network design, stability and planning. BlockSIM:一个实用的仿真工具，用于优化网络设计，稳定性和规划。
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751320
Santosh Pandey, Gopal Ojha, B. Shrestha, Rohit Kumar
{"title":"BlockSIM: A practical simulation tool for optimal network design, stability and planning.","authors":"Santosh Pandey, Gopal Ojha, B. Shrestha, Rohit Kumar","doi":"10.1109/BLOC.2019.8751320","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751320","url":null,"abstract":"As the benefits of blockchain become clear, in the past year we have witnessed an explosive growth in the use of blockchain based systems. However, as with any new technology, adoption of blockchain carries with it, as yet not widely known, risks that should be properly evaluated and understood prior to design and development. Given the purely distributed nature of blockchain, in which nodes can span continents, a key aspect in planning and designing blockchain systems which is not readily incorporated in a modern architect’s vernacular is consideration of eventual consistency, system stability and scalability when designing blockchain based systems. This is compounded by the fact that, as yet, very few practical tools are available to help architects better understand and plan for the above. In this paper we introduce BlockSIM, a comprehensive and open source blockchain system simulation tool which can assist blockchain architects better evaluate the performance of planned private blockchain networks by running scenarios and decide the optimal system parameters suited for their purposes. We compare the results of our simulation with real blockchain networks and demonstrate that BlockSIM can be used effectively by architects of blockchain systems to plan and implement scalable, stable and resilient blockchain networks. Finally, we demonstrate via a real life example how architects can apply BlockSIM to plan and design real-world blockchain systems.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125602345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Demo: Blockchain for the Simplification and Automation of KYC Result Sharing 演示:区块链用于KYC结果共享的简化和自动化
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751480
Robert Norvill, M. Steichen, Wazen M. Shbair, R. State
{"title":"Demo: Blockchain for the Simplification and Automation of KYC Result Sharing","authors":"Robert Norvill, M. Steichen, Wazen M. Shbair, R. State","doi":"10.1109/BLOC.2019.8751480","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751480","url":null,"abstract":"Know Your Customer (KYC) processes performed by banks on their customers are redundant, cumbersome and costly. Therefore, a system is proposed to automate menial tasks and allow sharing of data related to KYC. A blockchain dictates the collaboration between different participants and several services are built around it to support the functionality of the system as a whole. An access control system is used to share data legitimately.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122999409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 13
Sora: A Decentralized Autonomous Economy 苍井空:去中心化自治经济
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751489
Makoto Takemiya
{"title":"Sora: A Decentralized Autonomous Economy","authors":"Makoto Takemiya","doi":"10.1109/BLOC.2019.8751489","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751489","url":null,"abstract":"Money, when viewed as a social construct, can be a powerful tool for organizing society and allocating finite resources. However, existing monetary systems are highly centralized and this centralization has caused many crises in recent times. We therefore propose a token-based economic system that is self-regulating, can adjust the quantity of tokens to provide liquidity as needed, and avoids moral hazards. An early version of this system has been implemented on a blockchain platform as the Sora decentralized autonomous economy (DAE). Through allocating votes in a Sybil-resistant way, the Sora DAE democratically allocates new purchasing power according to open referendums. A dual-token system allows both stability of value for payments and creation of tokens for economic growth.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121534766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Increasing Trust in Tor Node List Using Blockchain 使用区块链增加对Tor节点列表的信任
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751340
Lukás Hellebrandt, I. Homoliak, K. Malinka, P. Hanáček
{"title":"Increasing Trust in Tor Node List Using Blockchain","authors":"Lukás Hellebrandt, I. Homoliak, K. Malinka, P. Hanáček","doi":"10.1109/BLOC.2019.8751340","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751340","url":null,"abstract":"Tor is a low-latency free anonymization network based on onion routing. In Tor, directory servers maintain a list of all nodes. It is, however, possible for a powerful adversary (e.g., law enforcement agencies) to seize or compromise enough directory servers and thus forge that list. Therefore, clients that obtained such a forged list of nodes can be effectively deanonymized. As a countermeasure, we propose to utilize a permissioned blockchain with a single voting committee that is privately “elected” by a verifiable random function (VRF). Since the blockchain provides us with integrity guarantees by design, we increase trust in the directory servers by decentralizing management of Tor nodes present in the shared list. We apply skiplist as an optimization reducing a validation overhead of newly joined nodes and clients. The proposed approach has only a small performance impact on the existing Tor infrastructure.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132698486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
Mint Centrality: A Centrality Measure for the Bitcoin Transaction Graph 铸币厂中心性:比特币交易图的中心性度量
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751401
Beltran Borja Fiz Pontiveros, M. Steichen, R. State
{"title":"Mint Centrality: A Centrality Measure for the Bitcoin Transaction Graph","authors":"Beltran Borja Fiz Pontiveros, M. Steichen, R. State","doi":"10.1109/BLOC.2019.8751401","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751401","url":null,"abstract":"In this work, we consider the graph of confirmed transactions in bitcoin. Understanding this graph is essential to discern the different economic activities conducted by the pseudonymous actors. In addition to traditional graph analysis methods, new metrics need to be engineered specifically for the bitcoin transaction graph. Hence, we propose a new centrality measure named mint centrality. The measure uses the inherent tree structure of transactions in bitcoin and their relation to the corresponding set of coinbase transactions, and can be evaluated with linear complexity. We present preliminary results of the mint centrality on the first 200,000 blocks of the public bitcoin blockchain.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122941341","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Velocity: Scalability Improvements in Block Propagation Through Rateless Erasure Coding 速度:通过无速率擦除编码提高块传播的可伸缩性
2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC) Pub Date : 2019-05-14 DOI: 10.1109/BLOC.2019.8751427
N. Chawla, H. Behrens, Darren Tapp, D. Boscovic, K. Candan
{"title":"Velocity: Scalability Improvements in Block Propagation Through Rateless Erasure Coding","authors":"N. Chawla, H. Behrens, Darren Tapp, D. Boscovic, K. Candan","doi":"10.1109/BLOC.2019.8751427","DOIUrl":"https://doi.org/10.1109/BLOC.2019.8751427","url":null,"abstract":"Blockchain technology and other distributed ledger systems fill an important role in resilient data storage and publication. However, their normally-decentralized methods also bring unique challenges distinct from more traditional approaches. One lies in the replication of data between participating nodes; since no individual node is more trusted than any other, each node maintains its own copy of the entire ledger for the purposes of validating new transactions. Improving how this information is stored and more importantly, how it propagates across the network, are open research questions. In this work, we propose Velocity, a novel block propagation approach based on fountain codes, allowing for better decentralized delivery of blocks and reduced network bottlenecks without sacrificing the security guarantees of the blockchain ledger itself. We also provide an assessment of economic incentives and their impact on participant behavior, showing that the proposed approach is financially beneficial to rational actors. We conclude by showing experimentally that this approach permits for the mining of even larger blocks, thereby increasing transaction throughput of the system compared to existing state of the art methods.","PeriodicalId":314490,"journal":{"name":"2019 IEEE International Conference on Blockchain and Cryptocurrency (ICBC)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124545501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 28
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