# Application of knowledge‐based cognitive CAPTCHA in Cloud of Things security

> Research article (Concurrency and Computation Practice and Experience, 2018) · cited 15× · AI/ML

**Wikidata**: [openalex:W2888953217](https://www.wikidata.org/wiki/openalex:W2888953217)  
**Source**: https://4ort.xyz/entity/application-of-knowledgebased-cognitive-captcha-in-cloud-of-things-security