Voting by paper as described is how it's done in most western countries for years and years. In general there are very few accusations of voting fraud.

This is because - among other things - that the system is transparent to everyone involved.

You are trying to fix a problem which don't exist - and you are fixing it the wrong way. E-voting opens up a huge amount of possibilities of cheating and worst of all it is going to be even more difficult to find out when it happens.

Worst of all the entire process will end to be transparent to the layman...