TY - GEN

T1 - Usability of CAPTCHAs or usability issues in CAPTCHA design

AU - Yan, Jeff

AU - El Ahmad, Ahmad Salah

PY - 2008

Y1 - 2008

N2 - 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.

AB - 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.

KW - CAPTCHA

KW - Security

KW - Usability

U2 - 10.1145/1408664.1408671

DO - 10.1145/1408664.1408671

M3 - Conference contribution/Paper

AN - SCOPUS:65449133250

SN - 9781605582764

SP - 44

EP - 52

BT - SOUPS 2008 - Proceedings of the 4th Symposium on Usable Privacy and Security

PB - ACM

CY - New York

T2 - 4th Symposium on Usable Privacy and Security, SOUPS 2008

Y2 - 23 July 2008 through 25 July 2008

ER -