> Casting a vote online can be secure and convenient
I don't recall convenience being a fundamental attribute of maintaining democracy.
Having said that, some countries' current voting systems are a mish-mash of different methods, approaches, technologies and even rules (I'm looking at you USA), that make paper-ballot voting less "convenient" than it could be. There's no reason why paper-ballot voting needs to be inconsistent across electoral boundaries, difficult to execute, or difficult to validate (cf: Australia's system).
I don't recall convenience being a fundamental attribute of maintaining democracy.
Having said that, some countries' current voting systems are a mish-mash of different methods, approaches, technologies and even rules (I'm looking at you USA), that make paper-ballot voting less "convenient" than it could be. There's no reason why paper-ballot voting needs to be inconsistent across electoral boundaries, difficult to execute, or difficult to validate (cf: Australia's system).