- Advertising patterns alone reveal identity traits without directly accessing personal data
- Creating AI profiles from ads is faster, cheaper and scalable
- Short browsing sessions provide enough data to make accurate personal inferences.
The ads that appear on your screen are not chosen at random, and researchers have now shown that AI can turn those ads into a detailed picture of your private life.
A team from UNSW Sydney and QUT examined more than 435,000 Facebook ads collected from 891 Australians through a citizen science project.
Using widely available large language models, the researchers found that they could predict users’ personal alignments without even seeing their history or personal data.
How your ad stream becomes a mirror of your life
Advertising platforms create profiles about you and then choose which ads to send you; Those choices create a unique ad pattern that reveals information about you to anyone who can view that pattern.
The study showed that AI tools could infer gender, age, education, employment, political preference, and economic status solely from exposure to ads.
The process was more than 200 times cheaper and 50 times faster than human analysis of the same advertising patterns.
Even brief browsing sessions gave the AI enough data to create an accurate profile, meaning attackers don’t need to monitor you for weeks.
The most likely attack vector is browser extensions, because most of these tools already require permission to read the content of the web page.
Popular extensions like ad blockers, coupon finders, and page translators need that access to function normally; However, those same permissions could be reused to silently collect the ads you see and send them to an attacker.
This scenario is serious due to its inherent stealth, as the extension continues to do its normal work, so you would never suspect anything is wrong.
No hacking is required and the advertising platform never knows that its delivery system is being used as a surveillance tool.
What this means for your online privacy
You can reduce your risk by being careful with browser extensions and adjusting your privacy settings.
Unfortunately, a VPN offers no protection here, because ads reach your device no matter how you connect to the Internet.
Individuals cannot completely solve this problem on their own because they cannot easily exclude themselves completely from the advertising economy.
The researchers argue that privacy laws must evolve to address not only the data that is collected, but also that which can be inferred from content that is passively consumed.
Your ad stream is a digital fingerprint that AI can now read, and it is ethical for laws to protect that digital fingerprint.
Follow TechRadar on Google News and add us as a preferred source to receive news, reviews and opinions from our experts in your feeds. Be sure to click the Follow button!
And of course you can also follow TechRadar on TikTok for news, reviews, unboxings in video form and receive regular updates from us on WhatsApp also.
