Practicality analysis of utilizing text-based CAPTCHA vs. graphic-based CAPTCHA authentication.

Abstract

CAPTCHA as "Completely Automated Public Turing test to tell Computers and Humans Apart" is becoming an essential tool to help reduce many automated security authentication attacks. This research focused on studying differences running text-based CAPTCHA vs. graphical-based CAPTCHA in a utilization applicable dominant practicality manner. The ordinary text-based CAPTCHA works simple to prevent automated submissions as thought of being relatively easy to exploit. On the other hand, graphic-based CAPTCHA can be more preferred from users side, but can be providing some complexities making clear tradeoff analysis need between its usability and security. Even though graphic-based CAPTCHA has been generally considered as improvement of text-based CAPTCHA with respect to security, its usage is still not common, raising a practicality gap needing some search for comparing the two methods side by side comprehensively involving usability applicability and cultural preference beside security. In this regard, this research contributes towards filling the gap in knowledge running thorough local experimentations for finding different CAPTCHA performance tradeoffs in terms of real statistical humanoid possibilities of practicality easiness, repetition secrecy, and configuration solving timing, that can be used as basis for conducting further techno improvement human-oriented research.