They're not necessarily so complicated. For example: you get a receipt, check it, and put it in a box. Another voter takes it home and can validate it against the official count.
This system was designed by a couple cryptographers, one of them Ron Rivest of RSA fame. For details on this and a couple other simple voting systems, see here:
http://rangevoting.org/RivSmiPRshort.html
This system was designed by a couple cryptographers, one of them Ron Rivest of RSA fame. For details on this and a couple other simple voting systems, see here: http://rangevoting.org/RivSmiPRshort.html