Security Aspects of Electronic Voting Systems

An electronic voting (e-voting) system is a voting system in which the election data is recorded, stored and processed primarily as digital information. There are two types of e-voting: on-line, e.g. via Internet, and offline, by using a voting machine or an electronic polling booth. Security is the main challenge of e-voting. This is the reason why designing a secure e-voting system is very important. In many proposals, the security of the system relies mainly on the black box voting machine. But, security of data, privacy of the voters and the accuracy of the vote are also main aspects that have to be taken into consideration when is building secure e-voting system. So, that is why in this paper we discuss about the security aspects for e-voting systems. The focus of this paper is on the data security. It means that cast ballot cannot be altered. The electoral register used in the system does not contain names, but only numeric identifiers. Also the electronic ballot box is sorted in a random way, before being decrypted, which offers a protection of privacy of the voters. Indeed, it might be possible to reconstruct the order of arrival of the electronic ballots and break the vote anonymity by comparing this order with the date and