2021 IEEE International Conference on Blockchain (Blockchain)最新文献_第4页

[Copyright notice] (版权)

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/blockchain53845.2021.00003

引用次数: 0

CySCPro - Cyber Supply Chain Provenance Framework for Risk Management of Energy Delivery Systems CySCPro -能源输送系统风险管理的网络供应链来源框架

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00020

Eranga Bandara, Deepak K. Tosh, S. Shetty, Bheshaj Krishnappa

引用次数: 0

SEVA: A Smart Electronic Voting Application Using Blockchain Technology SEVA:一个使用区块链技术的智能电子投票应用程序

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00056

J. Abegunde, Joseph Spring, Hannan Xiao

引用次数: 1

PUPoW: A Framework for Designing Blockchains with Practically-Useful-Proof-of-Work & VanityCoin PUPoW:一个设计区块链的框架，具有实用的工作量证明和虚荣币

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00026

Yash Chaurasia, Visvesh Subramanian, Sujit Gujar

{"title":"PUPoW: A Framework for Designing Blockchains with Practically-Useful-Proof-of-Work & VanityCoin","authors":"Yash Chaurasia, Visvesh Subramanian, Sujit Gujar","doi":"10.1109/Blockchain53845.2021.00026","DOIUrl":"https://doi.org/10.1109/Blockchain53845.2021.00026","url":null,"abstract":"Bitcoin is the first of its kind, a truly decentralized and anonymous cryptocurrency. To realize it, it has developed a blockchain technology using the concept of ‘Proof of Work’ (PoW). The miners, nodes responsible for writing transaction database, solve a cryptographic puzzle to claim the right to write to the database. Though bitcoin and many other relevant cryptocurrencies such as ether use revolutionary ideas, the main criticism involves the computing resource and energy consumption to solve the puzzles that have otherwise no use. There are attempts to use the PoW to do something useful, commonly referred to as Proof-of-Useful-Work (PoUW). In this paper, we attempt to (i) make PoUW more usable - describe how a central problem setter can crowdsource their work as PoUW and (ii) in the true spirit of blockchains, decentralize the role of problem setter, whom we call puzzlers. We propose a formal framework to do so, namely PUPow. PUPoW has an inbuilt provision of payments from puzzler to the miner who solves its puzzle. Additionally, miners have the option to not rely on continuous feed of the puzzles and instead use original PoW puzzles. We also propose a way to use PUPoW for solving TOR vanity URL generation and bitcoin vanity address generation problems. We call this PUPoW blockchain solving vanity address generation problems as VanityCoin. Both the problems need to generate public keys from private keys such that resultant addresses are of interest. Such key pairs are found only by a brute force search. However, there are privacy concerns that miners would know the private keys of the puzzlers. We resolve this by splitting the private keys, and the miners would know only one part of it. In summary, we are proposing how PoW can be made practically useful, and we believe such an approach is needed for PoW blockchains to survive.","PeriodicalId":372721,"journal":{"name":"2021 IEEE International Conference on Blockchain (Blockchain)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121956562","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: 1

Taming Propagation Delay and Fork Rate in Bitcoin Mining Network 比特币挖矿网络的传播延迟和分叉率控制

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00050

Suhan Jiang, Jie Wu

{"title":"Taming Propagation Delay and Fork Rate in Bitcoin Mining Network","authors":"Suhan Jiang, Jie Wu","doi":"10.1109/Blockchain53845.2021.00050","DOIUrl":"https://doi.org/10.1109/Blockchain53845.2021.00050","url":null,"abstract":"Bitcoin builds upon an unstructured peer-to-peer overlay network to disseminate transactions and blocks. Broadcast in such a network is slow and brings inconsistencies, i.e., peers have different views of the system state. Due to the delayed block propagation and the competition of mining, forking, i.e., the blockchain temporarily diverges into two or more branches, occurs frequently, which wastes computation power and causes security issues. This paper proposes an autonomous and distributed topology optimization mechanism to reduce block propagation delay and hence reduce the occurrence of blockchain forks. In the proposed mechanism, a node can autonomously update his neighbor set using the information provided by his current neighbors, since each neighbor will recommend a peer from his own neighbor set, i.e., a neighbor's neighbor, to this node. Each recommendation is based on a peer's propagation ability, which is characterized as a criteria function obtained through a combination of empirical analysis and machine learning. We further propose some metrics to evaluate a Bitcoin network topology. Experiment results reflect the effectiveness of the proposed mechanism and also indicate the correlation between block propagation time and fork rate.","PeriodicalId":372721,"journal":{"name":"2021 IEEE International Conference on Blockchain (Blockchain)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114261563","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: 3

Knocking on Tangle's Doors: Security Analysis of IOTA Ports 敲开Tangle的门:IOTA端口的安全分析

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00067

Alessandro Brighente, M. Conti, Gulshan Kumar, Reza Ghanbari, R. Saha

{"title":"Knocking on Tangle's Doors: Security Analysis of IOTA Ports","authors":"Alessandro Brighente, M. Conti, Gulshan Kumar, Reza Ghanbari, R. Saha","doi":"10.1109/Blockchain53845.2021.00067","DOIUrl":"https://doi.org/10.1109/Blockchain53845.2021.00067","url":null,"abstract":"Blockchains are currently deployed in a large number of different scenarios, such as cryptocurrencies, communications, factory automation, and vehicular networks. Both academia's and industry's interest in this technology is motivated by its distributed nature and its inherent security in managing information. However, traditional blockchains are limited in terms of the transaction rate they can approve. To overcome this limitation, IOTA proposed a novel blockchain based on a Directed Acyclic Graph (DAG) structure (the Tangle). It handles a larger number of transactions to target high-traffic scenarios such as Internet of Things (IoT). However, the security of the IOTA's blockchain depends on the design of its underlying communication protocols. In this paper, we analyze the security of the IOTA Tangle from a transport layer perspective. In particular, we show that well-known port-based attacks can jeopardize the integrity and availability of the IOTA services. We focus on the IOTA's TCP-based ports, and provide a discussion of all the possible attacks and their effects. We assess their validity via experimental evaluation showing their effect on the network operations. Results show that SYN flooding affects the gossip protocol by fully disrupting the service. We also find that 16% of the nodes are unable to create a neighbours list, leading to a disruption of the information exchange process. On the other side, we also show that some components are not affected by these attacks. To the best of our knowledge, we are the first to identify and validate these vulnerabilities in IOTA. Lastly, we discuss some possible countermeasures.","PeriodicalId":372721,"journal":{"name":"2021 IEEE International Conference on Blockchain (Blockchain)","volume":"260 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115875033","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: 3

Message from the 2021 Blockchain & the Circular Supply Chain Workshop Organizers 来自2021年区块链与循环供应链研讨会组织者的信息

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/blockchain53845.2021.00012

引用次数: 0

Message from the 2021 Symposium on Fintech and Blockchain Systems (FBS) Chairs 2021年金融科技和区块链系统(FBS)主席研讨会的致辞

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/blockchain53845.2021.00011

引用次数: 0

Scalable Blockchain Anomaly Detection with Sketches 可扩展的区块链异常检测与草图

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00013

Tomer Voronov, D. Raz, Ori Rottenstreich

{"title":"Scalable Blockchain Anomaly Detection with Sketches","authors":"Tomer Voronov, D. Raz, Ori Rottenstreich","doi":"10.1109/Blockchain53845.2021.00013","DOIUrl":"https://doi.org/10.1109/Blockchain53845.2021.00013","url":null,"abstract":"The growing popularity of Blockchain networks attracts also malicious and hacking users. Effectively detecting inappropriate and malicious activity should thus be a top priority for safeguarding blockchain networks and services. Blockchain behavior analysis can be used to detect unusual account activities or time periods with network-wide irregular properties. Thus, optimized anomaly detection based on historical data is an essential task for securing transactions and services. However, processing the complete blockchain history can be slow and costly due to its large size and rapid growth. In this paper we suggest addressing this challenge by analyzing summarized blocks data structures, called sketches, rather than the entire blockchain. Sketches are common data structures used in computer systems and blockchain networks, to allow compact data representation while supporting efficient executions of particular queries. We study how sketches can be used to detect suspicious accounts or time periods without the need to maintain or go through the entire blockchain data. We design solutions for the major known attacks and conduct experiments to evaluate them based on real Ethereum data. We compare the accuracy, run-time and memory usage of our algorithms with traditional detection algorithms relying on the complete blockchain data. Our results indicate that sketch-based anomaly detection methods can provide a practical scalable solution for detecting anomalies in blockchain networks.","PeriodicalId":372721,"journal":{"name":"2021 IEEE International Conference on Blockchain (Blockchain)","volume":"438 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126678643","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

VAULT: A Scalable Blockchain-Based Protocol for Secure Data Access and Collaboration VAULT:一种可扩展的基于区块链的安全数据访问和协作协议

2021 IEEE International Conference on Blockchain (Blockchain) Pub Date : 2021-12-01 DOI: 10.1109/Blockchain53845.2021.00059

Justin S. Gazsi, Sajia Zafreen, Gaby G. Dagher, Min Long

引用次数: 2