Privacy in Bitcoin Transactions: New Challenges from Blockchain Scalability Solutions

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• 关键词：Bitcoin ; Scalability ; Off ; chain transactions ; Lightning network ; Duplex micropayment channels
• 刊名：Lecture Notes in Computer Science
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：9880
• 期：1
• 页码：26-44
• 全文大小：1,549 KB
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• 作者单位：Jordi Herrera-Joancomartí (17)
  Cristina Pérez-Solà (17)
  
  17. Dept. d’Enginyeria de la Informació i les Comunicacions, Universitat Autònoma de Barcelona, 08193, Bellaterra, Catalonia, Spain
  
• 丛书名：Modeling Decisions for Artificial Intelligence
• ISBN：978-3-319-45656-0
• 刊物类别：Computer Science
• 刊物主题：Artificial Intelligence and Robotics
  Computer Communication Networks
  Software Engineering
  Data Encryption
  Database Management
  Computation by Abstract Devices
  Algorithm Analysis and Problem Complexity
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1611-3349
• 卷排序：9880

文摘

Bitcoin has emerged as the most successful cryptocurrency since its appearance back in 2009. However, its main drawback to become a truly global payment system is its low capacity in transaction throughput. At present time, some ideas have been proposed to increase the transaction throughput, with different impact on the scalability of the system. Some of these ideas propose to decouple standard transactions from the blockchain core and to manage them through a parallel payment network, relegating the usage of the bitcoin blockchain only to transactions which consolidate multiple of those off-chain movements. Such mechanisms generate new actors in the bitcoin payment scenario, the Payment Service Providers, and new privacy issues arise regarding bitcoin users. In this paper, we provide a comprehensive description of the most relevant scalability solutions proposed for the bitcoin network and we outline its impact on users’ privacy based on the early stage proposals published so far.