RSA SecurID Access

Thales

Symantec Whitepaper – Two-Factor Authentication

Duo – Two-Factor Authentication Evaluation Guide

Schneier on Security – More on Two-Factor Authentication

BrightTALK – Two-Factor, Too Furious: Subverting (and Protecting) Multi-factor Authentication

SANS Whitepaper – Two-Factor Authentication: Can You Choose the Right One?

SANS Whitepaper – Biometrics and User Authentication

YouTube – Identification and Authentication – Information Security Lesson

Environmental Protection Agency – Identification and Authentication Procedure