# An encrypted speech retrieval algorithm based on Chirp-Z transform and perceptual hashing second feature extraction

> Research article (Multimedia Tools and Applications, 2019) · cited 13× · AI/ML

**Wikidata**: [openalex:W2995219229](https://www.wikidata.org/wiki/openalex:W2995219229)  
**Source**: https://4ort.xyz/entity/an-encrypted-speech-retrieval-algorithm-based-on-chirp-z-transform-and-perceptual-hashing-second-feature-extraction