Lula has sued Bolsonaro for various reasons, one of which is accusing the country's computerized voting system of being vulnerable.

Bolsonaro has done much to undermine democracy and elections in Brazil, and morally deserves punishment. However, the general claim that Brazil's computerized voting system makes Brazil's elections vulnerable is valid. That is because the machines record only totals, and do not keep individual paper ballots that voters marked by hand. Such systems are vulnerable to someone, somehow.

Brazilian experts campaigned against this system when it was adopted, demanding a system that enabled the results to be audited, but they lost the battle.

There is no evidence that anything wrong happened in the voting machines in this election, but Brazil should change to an audit-able voting system for the sake of the future.