Symantec Whitepaper – Two-Factor Authentication

Duo – Two-Factor Authentication Evaluation Guide

Schneier on Security – More on Two-Factor Authentication

BrightTALK – Cybersecurity Roundtable: MFA Bypass and How to Defend Against It

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

SANS Whitepaper – Implementing IEEE 802.1x for Wired Networks

Open Web Application Security Project (OWASP) – Authentication Cheat Sheet