So here in Australia we use plain old paper and pencil ballots (it is the same in every state - it's Federal). How does electronic security compare to pencil on

So here in Australia we use plain old paper and pencil ballots (it is the same in every state - it's Federal). How does electronic security compare to pencil on (anonymous) paper ? I am sure paper fraud happens - as would manual counting (it is manual but overseen of course). Is it perhaps that with electronic both the scale can be increased and the chance of detection decreased?