Passkeys are gaining traction across both consumer and enterprise applications as a secure alternative to passwords. This project walks through how to implement Passkey's from scratch, with a focus on the cryptographic operations behind registration and authentication. We'll also explore the WebAuthN protocol to understand what makes Passkeys a phishing resistant technology.

Facial recognition is ubiquitous—from unlocking phones to verifying identity at airports. This project walks you through building a facial recognition system from scratch, including liveness detection and anti-spoofing techniques. We'll also explore techniques that combine face and voice for even strong biometric based multi-factor authentication.

Voice recognition is controversial. While AI has made it easier to clone and replay voices, voice is also becoming a preferred way to interact with modern technology—think Jarvis from Iron Man. This project walks through building a voice recognition system from scratch, while highlighting its vulnerabilities and why the technology must evolve to support secure, voice-based authentication.

Fingerprint recognition remains a widely used biometric method for verifying identity. This project walks through how to build a fingerprint recognition system from scratch. I'll cover fingerprint image acquisition, preprocessing (such as noise reduction and ridge enhancement), feature extraction (like minutiae points), and various fingerprint matching algorithms.

Keystroke dynamics analyze the unique way a person types—making it possible to verify identity without explicit input. This project walks through how to build a keystroke-based authentication system, suitable for detecting anomalies or extending authentication sessions securely.