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Summary: Two Factor Authentication Using Mobile Phones
Fadi Aloul, Syed Zahidi
Department of Computer Science & Engineering
American University of Sharjah, UAE
{faloul, b00017408}@aus.edu
Wassim El-Hajj
College of Information Technology
UAE University
welhajj@uaeu.ac.ae
Abstract- This paper describes a method of implementing two
factor authentication using mobile phones. The proposed
method guarantees that authenticating to services, such as
online banking or ATM machines, is done in a very secure
manner. The proposed system involves using a mobile phone
as a software token for One Time Password generation. The
generated One Time Password is valid for only a short user-
defined period of time and is generated by factors that are
unique to both, the user and the mobile device itself.
Additionally, an SMS-based mechanism is implemented as
both a backup mechanism for retrieving the password and as
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