## 1 Introduction
Some countries seek to increase voter turnout, others seek to reduce electoral fraud, and others reduce bureaucratic procedures and make it easier for voters [2]. Electronic voting can meet these numerous objectives to speed up, simplify, and reduce the cost of elections, and it encourages higher voter turnout, particularly among young voters, who are the most tech-savvy. To better fulfill the legal aspect and organize the best possible elections, many countries have started or are implementing some form of electronic voting. There are many definitions of electronic voting, but according to [6], it is a way to get responses from voters at a given time and make elections more efficient. According to [7], electronic voting is a system where registration, ballot casting, or counting are conducted using information and communication technologies. Therefore, electronic voting can be any voting method in which voter preferences can be expressed or collected through electronic resources. There are various ways to organize electronic voting. Some countries use different electronic devices at polling stations, while others use the Internet [8]. Regardless of the methods used, all efforts to implement new technologies aim to ensure the credibility of the voting process and of the election results. The electronic system faces various challenges but must guarantee the anonymity and privacy of voters to be reliable. Electronic voting systems must also consider transparency, verifiability, and other aspects. Various types of technology offer different possibilities for these features, but there are also difficulties in achieving these features. The use of technology in electoral processes must be safe and secure to the same extent that equivalent manual processes are safe and reliable. Today, many countries have developed or are developing advanced voting systems using the latest technologies to enable all citizens to vote quickly and accurately regardless of their location [9; 10]. However, some countries have stopped e-voting projects due to the unreliability of the technologies used [11], but distributed Blockchain technology can increase credibility and reliability. There is always controversy with any new technology, so continual research on all aspects of the process and technology is necessary. Despite the many benefits of online or electronic balloting using different methods, digital vote casting needs to be significantly researched because it can also introduce new threats [12], such as modifying the voter list or adding illegitimate voters, accounting theft, or account interference. Blockchain technology offers some attractive features, such as transparency, immutability, and distributed consensus, which are difficult to achieve using other technologies. These features make Blockchain an appealing technology for elections, as distributed consensus might boost voter confidence and guarantee correct outcomes. Blockchain technology has primarily been used in banking and finance, where anonymity is not required because it is necessary to know who is making the transaction; however, in electronic voting, anonymity is a required and indisputable feature. There have been several reviews and ideas about Blockchain technology, but Blockchain-based applications and electronic voting have generally received limited attention [13]. However, there are several different schemes and protocols that other authors have proposed, but privacy and anonymity are the main challenges that have not yet been adequately addressed. Our paper analyzes how Blockchain technology might be used to alleviate these challenges. The main focus will be on assuring privacy and anonymity through the latest Blockchain technology, which offers new possibilities that previous technologies did not. In addition to analyzing and comparing existing electronic voting solutions in Blockchain, we also propose a schema by combining two different Blockchains. The concept used in this scheme enables voter privacy and voting anonymity as two basic rights in the voting process.