The process of voting shall be observed by members of opposing parties and members of opposing interests and similarly to the process of counting the votes. Dep

The process of voting shall be observed by members of opposing parties and members of opposing interests and similarly to the process of counting the votes. Depending on your country you can most likely keep an eye on them yourself. Typically it's citizens who are volunteering to run the elections, everyone with mixed interests. It's enough for one of them to be an outsider and blow the whistle if s/he sees everyone else try something shady together. It's to an extent possible to mount a local attack with paper ballots but its cost is an effort too great that it doesn't scale. You would basically have to get your own people, or paid people, to swap the ballots while nobody else is watching to get the results you want in one election district. Because ballots need to be saved for recounting the marks on the ballots also need to be sufficiently distinct so that they don't look like they all come from a photocopier. Again, if there seems to be anything fishy, people can and will organise to redo the election locally, this time with different representatives from the parties. With digital voting, vulnerabilities and malware and automated attacks scale to all systems involved and theoretically a single entity can rewrite the election results of the whole nation. Worse yet, it may not be evident whether the results are skewed or not as it's just digits in a computer and those can be changed without a trace.