Preprint Review Version 1 Preserved in Portico This version is not peer-reviewed

Who Is Contributing to Academic Research on Blockchain Oracles? A Bibliometric Analysis

Version 1 : Received: 7 September 2021 / Approved: 8 September 2021 / Online: 8 September 2021 (07:48:05 CEST)
Version 2 : Received: 30 April 2022 / Approved: 4 May 2022 / Online: 4 May 2022 (12:07:49 CEST)

A peer-reviewed article of this Preprint also exists.

Caldarelli, G. Overview of Blockchain Oracle Research. Future Internet, 2022, 14, 175. Caldarelli, G. Overview of Blockchain Oracle Research. Future Internet, 2022, 14, 175.


With the advent of smart contracts, the benefits of decentralization offered by distributed ledger technologies could be implemented in sectors other than cryptocurrencies, such as Healthcare, Supply Chain, and Finance. Smart contracts, however, need oracles to fetch data from the real world, which, on the other hand, do not offer the same characteristics of decentralization as blockchain. Despite their importance, research on oracles is still in its infancy, and academic contribution on the subject is scarce and sporadic. With a bibliometric analysis, this study aims to shed light on the institutions and authors that are actively contributing to the oracle literature with the aim of promoting progress and cooperation. The study shows that although there is still a lack of collaboration worldwide, there are authors and institutions working in similar directions. On the other hand, it can be observed that most of the areas of research are poorly addressed while others are even uncovered.


Blockchain; Smart Contracts; Oracles; IoT; Bibliometric Analysis.


Engineering, Control and Systems Engineering

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