BANGKOK, THAILAND – Thailand’s election commission defended the use of barcodes on ballot papers as a security tool, while IT experts and opposition figures warned of risks to ballot secrecy after a nationwide voter data leak.
Commission insists barcodes do not breach secrecy
Election commission secretary-general Sawaeng Boonmee justified the use of barcodes on ballots as necessary protection against forgery and abuse. In a Facebook post that was later removed, he stressed that the principles of direct and secret elections were core United Nations human-rights standards and were not violated by the barcodes.
Security measures aimed at “free and fair” vote
Sawaeng said the barcodes formed part of a broader set of measures intended to keep elections “free and fair” and to prevent ballot forgery, the use of ballots in the wrong constituencies and errors in distribution and management. He pointed to procedures designed so that ballot secrecy was not affected, including separate storage of ballots, stubs and voter lists, as well as different responsibilities for each processing step.
Dispute over traceability of individual votes
Responding to fears that photos of barcoded ballots could reveal how individuals voted, Sawaeng said this was
“definitely not possible”.
said Sawaeng Boonmee, election commission secretary-general. He stated that access to any documents that could link voters and ballots was strictly regulated and generally required a court order in the context of election complaints.
Isolated misconduct reported at polling stations
Sawaeng acknowledged two reported cases of alleged misconduct by polling staff but described them as individual violations. Such incidents, he argued, should not be seen as evidence that the entire electoral system as such had been compromised.
Tech executive warns of nationwide data leak
Technology manager Thanarat Kuawattanaphan, chief operating officer of DomeCloud, reported serious weaknesses in the voter verification system that had led to a nationwide outflow of voter data. A so‑called White-Hat hacker had alerted him that basic cyber‑security measures were missing, making it possible to create an unauthorized copy of the national voter database.
Linked databases heighten identification fears
According to Thanarat, the leak included sequential voter numbers that also appeared on detachable ballot stubs, potentially lowering the technical barrier to linking individuals with their voting choices. He added that the newly leaked voter lists had been merged with previously leaked personal data sets, creating highly detailed collections including national ID numbers that were being traded in data bundles at low prices.
Opposition criticizes identification system
The People’s Party leader Natthaphong Ruengpanyawut said that two-thirds of the information needed to potentially identify ballots was already public. This included images of the pink ballots from the vote count, as well as the leaked nationwide voter numbers.
Debate over integrity of secret ballot
Natthaphong argued that essentially only the ballot stubs were missing and warned that if even a single stub could be matched with publicly available counting photos, the commission’s claim of a truly direct and secret vote would be called into question. In his view, the problem lay in identifiers such as barcodes that could uniquely link individual ballots to a person, making them central to the current debate over trust in the electoral process.