[filoeleven]

It’s possible to keep it secret, it’s just more complicated. I proposed one such setup in an old comment. Quoted here with some fixes.

“What if you get the receipt with UUID and your voting choices, then at a separate kiosk only in the polling station, you can enter your UUID to view the full results as posted online (meaning electronically recorded and stored). Along with your UUID and results, a hash of the two is displayed and can be printed onto your receipt. Before leaving the station, you must detach and dispose of the plaintext voting choices portion, but you can hang onto the UUID + hash.

At any time in the future, you can enter your UUID into the site, which will compute and display only the hash, giving you verification of no tampering but not disclosing any results to nefarious third parties.”

https://news.ycombinator.com/item?id=14921442

It’s not foolproof and still requires more trust in maths than just showing your voting choices would. But it does solve vote buying and voter intimidation.