If we were to poll the readers of this article, we would likely find that the vast majority of readers — if not all — regularly shop online, make banking transactions online, fill out registrations and applications online, pay taxes online and maybe even vote for contestants in reality shows online. Yet Americans cannot vote for candidates for public office online. … But experts warn that online voting isn’t as simple as it sounds. Even though it has already been tried in a few places around the world, it probably can’t be secured. We already worry about hackers stealing our credit cards and our identities. If we voted online, we would have to worry about hackers stealing our elections, too.… Several countries have experimented with online voting, but none has forged ahead as far as the tiny Baltic country of Estonia, where nearly a third of ballots are cast online. But Estonia’s elections don’t look anything like those of the United States, where more votes are cast in some cities than in all of Estonia. The Estonian online voter must plug a national ID card — mandatory for all Estonians older than 15, and each of which has an embedded encrypted chip — into a card reader attached to his or her computer. It sounds secure, but two independent assessments, led by Verified Voting in 2011 and the University of Michigan in 2014, found serious flaws with the system.