Private data access in blockchain systems employing coded sharding

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2 Citations (Scopus)

Abstract

In present blockchain systems, privacy of transactions is maintained by keeping the identity of accounts anonymous. The associated pseudonyms are ephemeral in nature, and can not be easily traced back to the real identity. An alternate infallible approach is to make use of private information retrieval (PIR) protocols that enable users to fetch details of transactions without revealing which transactions they seek. In this paper, we formalize this approach for blockchain systems that employ coded sharding. We present a PIR protocol for private data access, in particular private balance-checking, in blockchain systems when data is stored using generalized Reed-Solomon codes. Our protocol can be readily applied to the PolyShard scheme that has been recently proposed as a method to build truly scalable blockchain system.

Original languageEnglish
Title of host publication2021 IEEE International Symposium on Information Theory - Proceedings
EditorsBikash Dey
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages2684-2689
Number of pages6
ISBN (Electronic)9781538682098
ISBN (Print)9781538682104
DOIs
Publication statusPublished - 2021
EventIEEE International Symposium on Information Theory 2021 - Online, Melbourne, Australia
Duration: 12 Jul 202120 Jul 2021
https://ieeexplore.ieee.org/xpl/conhome/9517708/proceeding (Proceedings)
https://2021.ieee-isit.org/

Publication series

NameIEEE International Symposium on Information Theory - Proceedings
PublisherIEEE, Institute of Electrical and Electronics Engineers
Volume2021-July
ISSN (Print)2157-8095

Conference

ConferenceIEEE International Symposium on Information Theory 2021
Abbreviated titleISIT 2021
Country/TerritoryAustralia
CityMelbourne
Period12/07/2120/07/21
Internet address

Keywords

  • balance checking
  • blockchain
  • cryptocurrency
  • privacy
  • private information retrieval
  • sharding

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