**1. Introduction**

As a result of the advancement of technology in power systems, the importance of using new methods to protect smart grids (SGs) becomes more apparent, and one of these methods is blockchain. In October 2008, in the reference [1], blockchain technology distribution was seen under the alias "Satoshi Nakamoto", with the aim of supporting the first Bitcoin cryptocurrency, and it resulted in the start of the Bitcoin network in January 2009. After that, Bitcoin has arrived inchmeal at the financial industry systems, and is recognized as the most influential and important cryptocurrency. Besides, blockchain technology after Bitcoin has become a game-variable innovation around the world, and lots of industries exist which will be interrupted via blockchain, including the life sciences, legal industry, health care, financial services, cyber security, supply series management,

**Citation:** Dehghani, M.; Ghiasi, M.; Niknam, T.; Kavousi-Fard, A.; Shasadeghi, M.; Ghadimi, N.; Taghizadeh-Hesary, F. Blockchain-Based Securing of Data Exchange in a Power Transmission System Considering Congestion Management and Social Welfare. *Sustainability* **2021**, *13*, 90. https://dx.doi.org/10.3390/ su13010090

Received: 28 November 2020 Accepted: 21 December 2020 Published: 23 December 2020

**Publisher's Note:** MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

**Copyright:** © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/ licenses/by/4.0/).

farhad@tsc.u-tokai.ac.jp

cloud storage, charity, electing, government, social interests, energy management, private transport and ride sharing, retail, and actual estate between others [2–4]. Blockchain usages in carbon credits, distributed energy resources, and renewable and power system data security versus cyber-attacks are really encouraging [5,6].

So, the available electricity market must be modified to benefit from this novel technology. In this study, there are two purposes, including examining how a great industrial user is able to manage best under such a novel blockchain on the basis of an electricity market as well as how to be safe from cyber-attacks like false data injection attack (FDIA).
