Security Agencies Worldwide Found to Use Ad-Based Surveillance System

Security agencies around the world have been found to utilize a surveillance system that is based on advertisements. This discovery was made by researchers, who have published their findings in an article. The system's use by these agencies has been documented, although specific details about the system and its deployment are not provided in the available information. The research was conducted by Citizen Lab, which has released a report on the matter. The report is available online, along with a discussion forum where users can comment on the findings.