Evaluating the Usability of Optimizing Text-based CAPTCHA Generation
Journal Title: International Journal of Advanced Computer Science & Applications - Year 2016, Vol 7, Issue 8
Abstract
A CAPTCHA is a test that can, automatically, tell human and computer programs apart. It is a mechanism widely used nowadays for protecting web applications, interfaces, and services from malicious users and automated spammers. Usability and robustness are two fundamental aspects with CAPTCHA, where the usability aspect is the ease with which humans pass its challenges, while the robustness is the strength of its segmentation-resistance mechanism. The collapsing mechanism, which is removing the space between characters to prevent segmentation, has been shown to be reasonably resistant to known attacks. On the other hand, this mechanism drops considerably the human-solvability of text-based CAPTCHAs. Accordingly, an optimizer has previously been proposed that automatically enhances the usability of a CAPTCHA generation without sacrificing its robustness level. However, this optimizer has not yet been evaluated in terms of improving the usability. This paper, therefore, evaluates the usability of this optimizer by conducting an experimental study. The results of this evaluation showed that a statistically significant enhancement is found in the usability of text-based CAPTCHA generation.
Authors and Affiliations
Suliman Alsuhibany
Keywords
Related Articles
- EP ID EP128608
- DOI 10.14569/IJACSA.2016.070823
- Views 89
- Downloads 0
Multithreaded Sliding Window Approach to Improve Exact Pattern Matching Algorithms
In this paper an efficient pattern matching ap-proach, based on a multithreading sliding window technique, is proposed to improve the efficiency of the common sequential exact pattern matching algorithms including: (i) B...
A Simple Exercise-to-Play Proposal that would Reduce Games Addiction and Keep Players Healthy
Games players usually get addicted to video games in general and more specifically to those that are usually played over the internet. These players prefer to stay at home and play games rather than playing sports or out...
Developing a Real-Time Web Questionnaire System for Interactive Presentations
Conducting presentations with bi-directional communication requires extended presentation systems, e.g., having sophisticated expressions and gathering real-time feedback. We aim to develop an interactive presentation sy...
Transmission Control for Fast Recovery of Rateless Codes
Luby Transform (LT) codes are more important in communication applications due to the characteristics of fast encoding/decoding process, and low complexity. However, LT codes are optimal only when the number of input sym...
Sentiment Analysis and Classification of Photos for 2-Generation Conversation in China
Appropriate photos can help the Chinese empty-nest elderly and young volunteers find common topics to promote communication. However, there are little researches on such photo in China. This paper used 40 online photos w...