Repeat-Authenticate Scheme for Multicasting of Blockchain Information in IoT Systems

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We study the problem of efficiently disseminating authenticated blockchain information from blockchain nodes (servers) to Internet of Things (IoT) devices, through a wireless base station (BS). In existing blockchain protocols, upon generation of a new block, each IoT device receives a copy of the block header, authenticated via digital signature by one or more trusted servers. Since it relies on unicast transmissions, the required communication resources grow linearly with the number of IoT devices. We propose a more efficient scheme, in which a single copy of each block header is multicasted, together with the signatures of servers. In addition, if IoT devices tolerate a delay, we exploit the blockchain structure to amortize the authentication in time, by transmitting only a subset of signature in each block period. Finally, the BS sends redundant information, via a repetition code, to deal with the unreliable wireless channel, with the aim of decreasing the amount of feedback required from IoT devices. Our analysis shows the trade-off between timely authentication of blocks and reliability of the communication, depending on the packet loss rate offered by the channel. The numerical results show that the performance benefits of the proposed scheme makes it a viable starting point for designing new lightweight protocols for blockchains.

Original languageEnglish
Title of host publication2019 IEEE Globecom Workshops (GC Wkshps)
Number of pages7
Publication date5 Mar 2020
Article number9024468
ISBN (Print)978-1-7281-0961-9
ISBN (Electronic)978-1-7281-0960-2
Publication statusPublished - 5 Mar 2020
Event2019 IEEE Globecom Workshops (GC Wkshps) - Waikoloa, United States
Duration: 9 Dec 201913 Dec 2019


Conference2019 IEEE Globecom Workshops (GC Wkshps)
Country/TerritoryUnited States
SeriesProceedings of the IEEE Globecom Workshops (GC Wkshps)


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