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Training AIs to Solve CAPTCHAs

New research demonstrates that vision-language models can learn to solve CAPTCHAs more efficiently over time, undermining a cornerstone of automated-abuse prevention that many European enterprises still rely on.

Summary written by editorial AI · Source link below

Filed by Schneier on Security1 min readRead at source ↗

Interesting research : Abstract : Vision-language models (VLMs) can solve visual CAPTCHAs without task-specific training, but the agents built on them approach every challenge from scratch. For such an agent, the hundredth instance of a familiar puzzle costs as much time and compute as the first. Specialized detectors invert the trade-off, answering in milliseconds but only for categories they were trained on. Neither improves with exposure. We study what changes when a solver improves with use.

Editorial Analysis

Why it matters

As VLMs gain the ability to solve CAPTCHAs at scale with decreasing cost, enterprises dependent on CAPTCHA-based bot defences face rising fraud and credential-stuffing risk.

What to do

Audit web-facing applications for CAPTCHA reliance and plan migration to behavioural or risk-score-based bot mitigation.

Forward-looking interpretation drafted by editorial AI under human review — not a reproduction of the source. See methodology.

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