An Implementation of a Geometric and Arithmetic CAPTCHA without Database

Author

Subpratatsavee, Puchong ; Kuha, Preeyawal ; Janthong, Narongrit ; Chintho, Chanchira

Author_Institution

Dept. of Comput. Sci., Kasetsart Univ., Chonburi, Thailand

fYear

2014

fDate

6-9 May 2014

Firstpage

1

Lastpage

3

Abstract

This research presented a geometric CAPTCHA which was not created from images in any database, but it is an image of a geometric shape that randomly generated from a program and its edge was incomplete. Geometric CAPTCHAs were tested with users to identify the number of angles from a shape and to do a simple calculation. Users must type a right answer to pass the CAPTCHA test. Geometric CAPTCHAs were test run with other similar three CAPTCHAs in terms of time for task completion, number of errors, and user´s satisfaction. This paper was a pilot study for designing a new image- based CAPTCHA, and the improved design will be made in the short future. This research presented a geometric CAPTCHA which was not created from images in any database, but it is an image of a geometric shape that randomly generated from a program and its edge was incomplete. Geometric CAPTCHAs were tested with users to identify the number of angles from a shape and to do a simple calculation. Users must type a right answer to pass the CAPTCHA test. Geometric CAPTCHAs were test run with other similar three CAPTCHAs in terms of time for task completion, number of errors, and user´s satisfaction. This paper was a pilot study for designing a new image-based CAPTCHA, and the improved design will be made in the short future.

Keywords

image processing; message authentication; CAPTCHA test; arithmetic CAPTCHA; authentication; geometric CAPTCHA; geometric shape image; image- based CAPTCHA; shape angle identification; task completion time; user satisfaction; CAPTCHAs; Databases; Educational institutions; Image edge detection; Security; Shape; Silicon;

fLanguage

English

Publisher

ieee

Conference_Titel

Information Science and Applications (ICISA), 2014 International Conference on

Conference_Location

Seoul

Print_ISBN

978-1-4799-4443-9

Type

conf

DOI

10.1109/ICISA.2014.6847359

Filename

6847359