# Real-Time PPG-Based Biometric Identification: Advancing Security with 2D Gram Matrices and Deep Learning Models

> Research article (Sensors, 2024) · cited 13× · AI/ML

**Wikidata**: [openalex:W4405781891](https://www.wikidata.org/wiki/openalex:W4405781891)  
**Source**: https://4ort.xyz/entity/real-time-ppg-based-biometric-identification-advancing-security-with-2d-gram-matrices-and-deep-learning-models