Could be used to enforce voter coercion.
Imagine an employer who demands that an employee produce proof that they voted a certain way.
Imagine an employer who demands that an employee produce proof that they voted a certain way.
Voting that is done in person, in private (for instance: voting booths) is less susceptible to coercion than voting which is not done in person (for instance: mail-in). Systems that give out a receipt for the vote placed are also more susceptible to voter coercion, particularly if they are mathematically provable receipts that cannot be fabricated (nearly all "blockchain" proposals).