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AI Can Now Easily Unmask Your Secret Online Life (Even If You Use a Fake Name) (itsfoss.com)

submitted 1 day ago by Champoloo@hexbear.net to c/technology@hexbear.net

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cross-posted from: https://lemmygrad.ml/post/10899106

AI Can Now Easily Unmask Your Secret Online Life for $4

A new research paper from ETH Zurich, Anthropic, and MATS demonstrates that Large Language Models can automatically de-anonymize users across platforms like Reddit and Hacker News.

The AI acts like a digital detective using a method called ESRC (Extract, Search, Reason, Calibrate). It scans a user's post history for subtle clues (hobbies, writing style, locations), searches the wider internet (LinkedIn, other forums) for matches, and uses complex reasoning to confirm the identity.

The terrifying results:

It correctly linked secret Hacker News usernames to real people 67% of the time (with 90% accuracy when it made a firm guess).

It successfully matched a person's separate Reddit accounts from different years 68% of the time.

The entire automated process costs only $4 per target.

"Practical obscurity"-the idea that you're safe online because it takes too much human effort to connect your digital breadcrumbs-is dead. Anyone with a few dollars and an LLM API can now mass-dox thousands of pseudonymous accounts in minutes.

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[–] Thordros@hexbear.net 11 points 1 day ago* (last edited 1 day ago)

This is gonna be really unfortunate for the federal agent that unmasks my real identity, and unearths hundreds of pics of me going hog out all over the place in sex clubs 30 years ago.