Machines have paper audits no?
If you think this is evidence of a secure election, I have an unpickable lock to sell you. Anyone repeating the talking point that this was “the most secure election ever” sounds like a partisan hypocrite, especially when you can find videos of Democratic Congress members warning about the security of elections as recently as in 2017.
Or, maybe it’s a coincidence that polls asking questions about election security – an objectively non-partisan topic – find a distribution of opinions weirdly aligned with support for the red or blue team.
Alas, anonymous verifiable signatures must be impossible.
Mail-in ballots are no different. A limited, known number are printed. The system prioritizes in-person ballots in case the mailed one is filled out under pressure. Some states forbid unique ballot tracking, using theoretically non-unique identifiers.
Note that the map colors DRE w/ voter verifiable paper audit trail as (lightish) red. That's consistent with the prevailing opinion today that DRE w/ VVPAT is inferior to paper ballots with precinct tabulation (because voters do not necessarily actually examine the VVPAT), but does tend to make the current situation look worse than it is due to Nevada.
If you mean Arizona, see Title 16:
> After the canvass has been completed, the officer in charge of elections shall deposit the package or envelope containing the ballots in a secure facility managed by the county treasurer, who shall keep it unopened and unaltered for twenty-four months for elections for a federal office or for six months for all other elections, at which time he shall destroy it without opening or examining the contents.
> The officer in charge of elections shall ensure that electronic data from and electronic or digital images of ballots are protected from physical and electronic access, including unauthorized copying or transfer, and that all security measures are at least as protective as those prescribed for paper ballots.