likewise e-voting systems pass through cryptography experts auditing to verify it does what it says it does.
said that the voting solution can also provide cryptographic proof that your vote was unaltered, and accounted for, without need to expose your actual vote.
the claims about database altering, are also false as the vote is cryptographically signed and unalterable.
also there is another feature where you can recast vote on top of your previous one and the last vote will be the valid one. This is crucial for countries where the bad guys can come at your place and under distress (gun) force your vote. you can then recast safely invalidating the forced vote.
e-voting solutions is really interesting and in an alternate reality I think we could have had a mainstream e-voting and more even direct-democracy vs our current democracy by proxy (elected officials)