# HMM-based Attacks on Google's ReCAPTCHA with Continuous Visual and Audio Symbols

> Research article (Journal of Information Processing, 2015) · cited 14× · AI/ML

**Wikidata**: [openalex:W2283942345](https://www.wikidata.org/wiki/openalex:W2283942345)  
**Source**: https://4ort.xyz/entity/hmm-based-attacks-on-google-s-recaptcha-with-continuous-visual-and-audio-symbols