IEEE Consumer Electronics Magazine - January/February 2020 - 74

Theme Article: Special Section on Cognitive Science
and AI for Human Cognition and Communication

ImCAPTCHA:
Imperceptible CAPTCHA
Based on Cursor
Trajectories
Han Yu
Zhongnan University of Economics and Law

Yujie Li
Fukuoka University

Shenyong Xiao
Zhongnan University of Economics and Law

Yin Zhang
University of Electronic Science and Technology
of China

Zhijun Yu
Zhongnan University of Economics and Law

Abstract-In the process of network interaction, CAPTCHA (completely automated public
Turing test to tell computers and humans apart) is usually required. At present, the main
method for differentiating between humans and machines is to use CAPTCHA, which
includes images and text. Users need to interface with CAPTCHA for verification, which
prolongs the interaction step. The interactive experience is poor, and the process of
verification is not concealed. To simplify the verification process, optimize the interaction
behavior and increase the security of verification, this paper proposes a CAPTCHA method
based on a user's mouse operation behavior, and carries out a study on cursor trajectory
recognition. This method can reduce the manual procedure and improve the user
interactive experience. In this article, we propose an ensemble learning algorithm model
based on sliding sampling to classify and recognize cursor trajectory data. Experiments
show that the classification performance of the model is reliable for recognition based on
human-machine cursor trajectories, which is a new concept for CAPTCHA.

Digital Object Identifier 10.1109/MCE.2019.2936631
Date of current version 6 December 2019.

74

2162-2248 ß 2019 IEEE

Published by the IEEE Consumer Electronics Society

IEEE Consumer Electronics Magazine



IEEE Consumer Electronics Magazine - January/February 2020

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