# Covert Communications When the Warden Does Not Know the Background Noise Power

> Research article (IEEE Communications Letters, 2015) · cited 158× · AI/ML

**Wikidata**: [openalex:W2295172321](https://www.wikidata.org/wiki/openalex:W2295172321)  
**Source**: https://4ort.xyz/entity/covert-communications-when-the-warden-does-not-know-the-background-noise-power