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Those few technical words could have a big impact.

Voting machines that give all voters a ballot with one of those codes are used in hundreds of counties across 19 states. Three of them聽鈥� Georgia, South Carolina and Delaware聽鈥� use the machines statewide.

Some computer scientists, Democrats and left-leaning election activists have raised concerns about their use, but those pushing conspiracy theories about the 2020 presidential election have been the loudest, claiming without evidence that manipulation has already occurred. Trump, in justifying the move, said in the order that his intention was 鈥渢o protect election integrity.鈥�

Even some election officials who have vouched for the accuracy of systems that use coded ballots have said it鈥檚 time to move on because too many voters don鈥檛 trust them.

Colorado鈥檚 secretary of state, Democrat Jena Griswold, decided in 2019 to stop using ballots with QR codes, saying at the time that voters 鈥渟hould have the utmost confidence that their vote will count.鈥� Amanda Gonzalez, the elections clerk in Colorado鈥檚 Jefferson County, doesn't support Trump's order but believes Colorado's decision was a worthwhile step.

鈥淲e can just eliminate confusion,鈥� Gonzalez said. 鈥淎t the end of the day, that鈥檚 what I want聽鈥� elections that are free, fair, transparent.鈥�

Whether voting by mail or in person, millions of voters across the country mark their selections by using a pen to fill in ovals on paper ballots. Those ballots are then fed through a tabulating machine to tally the votes and can be retrieved later if a recount is needed.

In other places, people voting in person use a touch-screen machine to mark their choices and then get a paper record of their votes that includes a barcode or QR code. A tabulator scans the code to tally the vote.

Election officials who use that equipment say it鈥檚 secure and that they routinely perform tests to ensure the results match the votes on the paper records, which they retain. The coded ballots have nevertheless become a target of election conspiracy theories.

鈥淚 think the problem is super exaggerated,鈥� said Lawrence Norden of the Brennan Center for Justice. 鈥淚 understand why it can appeal to certain parts of the public who don鈥檛 understand the way this works, but I think it鈥檚 being used to try to question certain election results in the past.鈥�

Those pushing conspiracy theories related to the 2020 election have latched onto a long-running legal battle over Georgia's voting system. In that case, a University of Michigan computer scientist testified that an attacker could tamper with the QR codes to change voter selections and install malware on the machines.

The testimony from J. Alex Halderman has been used to amplify Trump鈥檚 false claims that the 2020 election was stolen, even though there is no evidence that any of the weaknesses he found were exploited.

Georgia Secretary of State Brad Raffensperger, a Republican, defended the state's voting system as secure. In March, the judge who presided over Halderman's testimony declined to block the use of Georgia鈥檚 voting equipment but said the case had 鈥渋dentified substantial concerns about the administration, maintenance and security of Georgia鈥檚 electronic in-person voting system.鈥�

Trump鈥檚 election executive order is being challenged in multiple lawsuits. One resulted in a preliminary injunction against a provision that sought to require proof of citizenship when people register to vote.

The section banning ballots that use QR or barcodes relies on a Trump directive to a federal agency, the U.S. Election Assistance Commission, which sets voluntary guidelines for voting systems. Not all states follow them.

Some of the lawsuits say Trump doesn鈥檛 have the authority to direct the commission because it was established by Congress as an independent agency.

While the courts sort that out, the commission鈥檚 guidelines say ballots using barcodes or QR codes should include a printed list of the voters鈥� selections so they can be checked.

Trump鈥檚 order exempts voting equipment used by voters with disabilities, but it promises no federal money to help states and counties shift away from systems using QR or barcodes.

鈥淚n the long run, it would be nice if vendors moved away from encoding, but there鈥檚 already evidence of them doing that,鈥� said Pamela Smith, president of Verified Voting, a group that focuses on election technology and favors ending the use of QR and barcodes.

Kim Dennison, election coordinator of Benton County, Arkansas, estimated that updating the county's voting system would cost around $400,000 and take up to a year.

Dennison said she has used equipment that relies on coded ballots since she started her job 15 years ago and has never found an inaccurate result during postelection testing.

鈥淚 fully and completely trust the equipment is doing exactly what it鈥檚 supposed to be doing and not falsifying reports,鈥� she said. 鈥淵ou cannot change a vote once it鈥檚 been cast.鈥�

Perhaps nowhere has the issue been more contentious than Georgia, a presidential battleground. It uses the same QR code voting system across the state.

Marilyn Marks, executive director of the Coalition for Good Governance, a lead plaintiff in the litigation over the system, said her group has not taken a position on Trump's executive order but said the federal Election Assistance Commission should stop certifying machines that use barcodes.

The secretary of state said the voting system follows Georgia law, which requires federal certification at the time the system is bought. Nevertheless, the Republican-controlled legislature has voted to ban the use of QR codes but did not allocate any money to make the change 鈥� a cost estimated at $66 million.

Republicans said they want to replace the system when the current contract expires in 2028, but their law is still scheduled to take effect next year. GOP state Rep. Victor Anderson said there is no realistic way to 鈥減revent the train wreck that鈥檚 coming.鈥�