For about as long as the internet has existed, users have been able to speak their mind freely through pseudonymous accounts that protect them from being doxxed or stalked.

But thanks to the advent of sophisticated AI, unmasking pseudonymous users on the internet has become ominously easy.

As detailed in a yet-to-be-peer-reviewed paper, a team of researchers at ETH Zurich and AI company Anthropic found that “large language models can be used to perform at-scale deanonymization.”