Captcha Design: Color, Usability, and Security
Authors: Ahmad Salah El Admad, Jeff Yan

Date: July 22 2011
Publication: IEEE Internet Computing, Volume 16 Issue 2 / Technical Report CS-TR-1203
Page(s): 44 - 51
Publisher: IEEE
Source 1:
Source 2:
Source 3: - Subscription or payment required

Abstract or Summary:
Most user interfaces use color, which can greatly enhance their design. Because the use of color is typically a usability issue, it rarely causes security failures. However, using color when designing CAPTCHAs, a standard security technology that many commercial websites apply widely, can have an impact on usability and interesting but critical implications for security. Here, the authors examine some CAPTCHAs to determine whether their use of color negatively affects their usability, security, or both. Note: Earlier technical report:

Do you have additional information to contribute regarding this research paper? If so, please email with the details.

<-- Back to Authentication Research Paper Index

[Home] [About Us] [News] [Research]

Copyright © 2019