What are self-replicating ‘AI worms’, and why is Anthropic worried about them?

The tech company says successful AI worms need more capability on less powerful devices, but current trends make that feasible by the end of the year Warnings about what artificial intelligence might do in the future – together with alarming reports of what it has gotten up to already – are being issued so quickly that even security experts have difficulty triaging what to worry about.

Yet a report this week from Anthropic’s offensive research team grabbed attention by describing a new, practical threat, one devoid of human characteristics or apocalyptic musings. The red team, as such internal testers are called, said it created a malicious AI program that spread autonomously through internet-connected…