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  1. Proceedings of the 4th symposium on Usable privacy and security (SOUPS '08)
  2. Usability of CAPTCHAs or usability issues in CAPTCHA design
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Improving text passwords through persuasion
Use Your Illusion: secure authentication usable anywhere
Evaluating assistance of natural language policy authoring
A user study of off-the-record messaging
Personal knowledge questions for fallback authentication: security questions in the era of Facebook
Usability of CAPTCHAs or usability issues in CAPTCHA design
Expressions of expertness: the virtuous circle of natural language for access control policy specification
The challenges of using an intrusion detection system: is it worth the effort?
Securing passfaces for description
Universal device pairing using an auxiliary device
Evaluating the usability of usage controls in electronic collaboration
Analyzing websites for user-visible security design flaws

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Usability of CAPTCHAs or usability issues in CAPTCHA design

Content Provider ACM Digital Library
Author Yan, Jeff El Ahmad, Ahmad Salah
Abstract CAPTCHA is now almost a standard security technology, and has found widespread application in commercial websites. Usability and robustness are two fundamental issues with CAPTCHA, and they often interconnect with each other. This paper discusses usability issues that should be considered and addressed in the design of CAPTCHAs. Some of these issues are intuitive, but some others have subtle implications for robustness (or security). A simple but novel framework for examining CAPTCHA usability is also proposed.
Starting Page 44
Ending Page 52
Page Count 9
File Format PDF
ISBN 9781605582764
DOI 10.1145/1408664.1408671
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2008-07-23
Publisher Place New York
Access Restriction Subscribed
Subject Keyword Captcha Security Usability
Content Type Text
Resource Type Article
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