Online voting is a pretty bad idea right now with current computer security technology. It eliminates the secret ballot, opens up elections to attacks from foreign countries, and there’s no way to tell if the computer the soldier is voting on has been compromised by viruses.
Obviously it will have to be heavily encrypted and used in a “closed system” at this point. Maybe even all the votes put into a single file and delivered elsewhere electronically and then uncompressed for sorting out.
I don’t know, but I think it can be done.