“How do you know it works?”
There’s been plenty of reporting on it here in California. Mexico has had their tamper proof voter ID system that allows Mexicans to vote from outside the country for over 20 years. If the system didn’t work then PAN would be raising hell and accusing the PRI of stealing elections like they did for 80 years.
https://www.researchgate.net/publication/261079250_Electronic_Voting_System_in_Mexican_Elections
Solid national IDs can definitely help in voting, and most Latin American countries have long required their citizens to carry national ID cards more generally.
But there really aren’t totally secure electronic voting machines out there. Lots of styles of documented fraud, from “fractional voting” to vendors literally loading PC Anywhere into their machines before shipping them out, so party bosses can simply pass in the general area of the machines and change votes from their mobiles, to pretty much any encryption being hackable and all kinds of other shenanigans that have gone on, including in the countries back in the years that your article quotes as examples of secure voting. I’m sorry, but just look at who owns most of the voting machine companies, as well.
E.g., I see Scytl provides Mexico with online voting capabilities. Lots of vulnerabilities found there, including a back door to their system for Switzerland. Here is an article that discusses some of the ties of the company to international intelligence organizations:
https://columbusfreepress.com/article/scytl-has-all-tools-it-needs-election-fraud
But there is plenty more you can find online.