Journal of Network and Information Security

2013 | Volume 1 | Issue Issue 2

Scratch CAPTCHA - A Novel Touch Scratch Approach to Resolve CAPTCHA Issues

1. Asif Hasnain – Comsats Institute Of Information Technology Islamabad, Pakistan

2. Waqas Malik – Comsats Institute Of Information Technology Islamabad, Pakistan

3. Mohsin Yaseen – Comsats Institute Of Information Technology Islamabad, Pakistan

4. Syed Jawad Hussain Shahzad – Comsats Institute Of Information Technology Islamabad, Pakistan

Received
14-Mar-2014 		Accepted
- 		Published
14-Mar-2014
Abstract
CAPTCHA [1; 2] (Reverse Turing Test) is an authorization test to ensure that response is coming from human. Over the years, its design has been vulnerable to different attacks that utilize the visual appearance of challenge. Therefore, designing a highly robust and usable CAPTCHA that can resist such attacks is highly desirable. The study proposes a novel scheme, named Scratch CAPTCHA. It is based on a new paradigm which emphasizes the notion that strength of the CAPTCHA must be formulated by the secrecy of challenge. We have tested the robustness of our idea against a simple bot attack that successfully emulates human behavior (or actions) but not their intelligence.
Keywords CAPTCHA, Bot Attack
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