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Abstract

In this paper, we present an authentication system which can be served as multi-factor authentication provider.
This system has supported various authentication methods (ASP Membership, OpenID, and SMS one-time
password) in either standard one-factor or multi-factor authentication method. It has been tested with two
consumer websites (MOSS 2007 website and ASP .NET MVC website) in either standard XML post or Diffie
Hellman protocol. This system was developed as a solution for user’s multi-account in multiple websites
problem.
Keywords: Diffie Hellman, Multi-factor Authentication, OpenID

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