# A Usable Authentication System Using Wrist-Worn Photoplethysmography Sensors on Smartwatches

> Research article (2019 IEEE Conference on Communications and Network Security (CNS), 2019) · cited 23× · AI/ML

**Wikidata**: [openalex:W2969490943](https://www.wikidata.org/wiki/openalex:W2969490943)  
**Source**: https://4ort.xyz/entity/a-usable-authentication-system-using-wrist-worn-photoplethysmography-sensors-on-smartwatches