Merging CAPTCHA and Graphical Password on NP Hard Problems in AI: New Security Enhancing Technique

Nayan Gawande

Abstract: CAPTCHA (Completely Automated Public Turing Test to tell computers and human apart) is a test build by computer programs which human can pass but computer programs cannot pass. A new technology is built over the captcha called graphical captcha which is resilient to dictionary attacks and hence more secure. With the hybrid use of CAPTCHA and graphical password one can addresses a number of security problems such as relay attacks, online guessing attacks and also shoulder surfing attacks. CaRP (Captcha as a graphical password) is not act as a cure all technique but it stipulates security and usability to legitimate users in real time applications.

Keywords: CAPTCHA, graphical password, CaRP, dictionary attacks, security, legitimate user

How to Cite?: Nayan Gawande, "Merging CAPTCHA and Graphical Password on NP Hard Problems in AI: New Security Enhancing Technique", Volume 3 Issue 12, December 2014, International Journal of Science and Research (IJSR), Pages: 980-983, https://www.ijsr.net/getabstract.php?paperid=5121402, DOI: https://dx.doi.org/10.21275/5121402