Brazil's AI Surveillance Surge Outpaces Legal Safeguards

Brazil is rapidly expanding its use of AI facial recognition for public security, deploying the technology across the country without a comprehensive national legal framework. This surge in biometric surveillance highlights a growing tension between the desire for efficient crime-fighting and the risk of systemic privacy violations.

According to the civil society organization O Panóptico, there are now more than 560 facial recognition projects active across Brazil, a figure that has more than doubled in just two years. In Rio de Janeiro, the military police have integrated diverse international technologies into their operations, utilizing Russian software from NTechLab (FindFace) on 330 street cameras and Chinese software from Dahua on 1,300 car-mounted cameras. Maj. Agdan Miranda Fernandes, head of infrastructure and technology for Rio's military police, described the system as "incredibly efficient."

The Cost of Efficiency

Since 2024, facial recognition has contributed to approximately 950 arrests in Rio, representing about 10% of the city's total arrests. However, the nature of these detentions reveals a gap between the technology's perceived purpose and its actual application. More than half of the arrests aided by facial recognition in Rio were for failure to pay child support, rather than for crimes posing direct threats to public security.

This deployment occurs against a backdrop of high crime rates, with roughly 40% of Brazilian citizens reporting they were victims of crime in the past year. While this environment has fostered widespread public support for surveillance, Brazil's regulatory landscape remains fragmented. Although the country has a general data-protection law, it includes specific exemptions for public security, creating a regulatory vacuum that contrasts sharply with the European Union's AI Act, which largely prohibits real-time biometric surveillance in public spaces.

Risks of Algorithmic Bias

Critics argue that the lack of legislative oversight exposes citizens to significant risks, particularly regarding racial discrimination. Emerson Betta, a lawyer at Rio de Janeiro’s public defender’s office, noted that facial recognition carries an "algorithmic bias of racial discrimination," which frequently targets Black men. There are further concerns that outdated judicial databases could lead to wrongful detentions.

Thallita Lima, a research coordinator at O Panóptico, suggests that the rush to adopt these tools is a reaction to systemic instability, stating, "Public security is a problem, and technology is presented as a supposedly quick solution."

The Path Forward

As Brazil continues to integrate AI into its policing strategies, the focus shifts to whether the government will establish a formal legal framework to govern biometric data. Observers are watching to see if the current regulatory vacuum will be filled by legislation that protects civil liberties or if the trend toward invasive surveillance will accelerate unchecked. The Brazilian experience serves as a global case study on how the fear of crime can drive the adoption of high-risk technology before the necessary legal safeguards are in place to prevent abuse.