Visual Question Authentication Protocol (VQAP)

Andeep S. Toor

doi:10.1016/j.cose.2017.11.017

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Visual Question Authentication Protocol (VQAP)

2018-07-01

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Andeep S. Toor *

Harry Wechsler

Michele Nappi

Kim‐Kwang Raymond Choo

DOI：10.1016/j.cose.2017.11.017

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Abstract

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Many conventional methods exist to authenticate a user, including text-based systems and graphical systems. While text-based authentication is secure, it is difficult for users to remember very robust passwords. Conversely, while graphical-based passwords that require selection of a correct image against incorrect (or distractor) ones have proven easier to remember, they are vulnerable to an attacker exploiting direct access to the selection (shoulder surfing) or prior knowledge about the user. In this work, we propose a novel authentication method that combines both graphical-based and text-based features that seeks to mitigate these risks. Our system, Visual Question Authentication Protocol (VQAP) offers enhanced security by introducing (1) a question about a registered image as a cue for a text-based password, (2) a novel machine-learning based classifier for selecting distractor images that are related (or relevant) to the given question, and (3) multiple authentication scenarios, some of which present incorrect information that only the true user should be able to identify. We present experiments for our classifier that validate our ability to separate relevant and irrelevant images suitably for authentication purposes, given a question. (C) 2017 Elsevier Ltd. All rights reserved.

Keywords:

Computer vision

Natural language processing

Machine learning

Deep learning

Visual question answering

Cued recall

Graphical authentication

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