Multi-factor Authentication - Musharof Chy
Wikipedia: Multi-factor Authentication
Describes the approach to authentication which requires the presentation of two or more factors.
About.com: What is Two-Factor Authentication?
Describes the basic concepts of the authentication method, and the components: what you know, what ...
Computerworld: QuickStudy: Authentication
Explains the concepts of answering the question "How do I know you're who you say you are?".
Two-Factor Authentication
Proof of concept. Tutorial using an image as the component "what you have".
What is Two-Factor Authentication?
Describes the factors used to grant the user access to the system.
Tech Republic: Implementing Multi-factor Authentication: What To Consider
To take into account when using them in a multi-factor authentication system.
VenturBeat: Two-factor Authentication is a False Sense of Security
Guest post from a user's point of view, analyzing the usability and security of TFA.
MSDN: Strong User Authentication on the Web
Aims to distill a comprehensive view of strong user authentication by examining its concepts, imple...
Two-factor Authentication
Analyzing secure methods from the perspective of governments.
IMB: Multi-Security Mechanisms With Multifactor Authentications
Approach for designing and implementing a multi-security mechanism with multi factor authentication...
LVN: Google Authenticator for Multi-Factor Authentication
Describes the Open Source project, client and server software implementation.