Human Interactive Proofs (HIPs) are automatic reverse Turing tests designed to distinguish between various groups of users. Completely Automatic Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a HIP system that distinguish between humans and malicious computer programs. Many CAPTCHAs have been proposed in the literature that text-graphical based, audio-based, puzzle-based and...

A novel strategy which works with improved performance in many factors. We have used Open CV, an picture handling tool kit for applying and examining our ideas. We present a new protection basic based on hard AI issues, namely, a novel family of visual protection password techniques built on top of Captcha technology, which we call Captcha as visual security passwords (CaRP). CaRP is both a Cap...

Atomizing various Web activities by replacing human to human interactions on the Internet has been made indispensable due to its enormous growth. However, bots also known as Web-bots which have a malicious intend and pretending to be humans pose a severe threat to various services on the Internet that implicitly assume a human interaction. Accordingly, Web service providers before allowing acce...

Human Interactive Proofs (HIPs) are automatic reverse Turing tests designed to distinguish between various groups of users. Completely Automatic Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a HIP system that distinguish between humans and malicious computer programs. Many CAPTCHAs have been proposed in the literature that text-graphical based, audio-based, puzzle-based and...

Code voting provides an appropriate technology to address the secure platform problem of remote Internet voting, but it is not particularly user-friendly. In this paper, we propose the use of CAPTCHAan acronym standing for Completely Automated Public Turing tests to tell Computers and Humans Apart to improve the user-friendliness of code voting, discuss the security of CAPTCHAbased code voting,...

Phishing is an attempt to commit fraud via social engineering. The impact is the breach of information security through the compromise of confidential data. Customers can access their banking accounts from anywhere in the world using their login ID and password. However, the use of password does not provide adequate protection against Internet fraud such as phishing. Phishing exploits this vuln...

A CAPTCHA is a program that generates challenges that are easy to solve for humans but difficult to solve for computers. The most common CAPTCHAs today are text-based ones where a short word is embedded in a cluttered image. In this paper, we survey the state-of-the-art of currently deployed CAPTCHAs, especially of some popular German sites. Surprisingly, despite their importance and the larges...

Efforts to defend against automated attacks on e-commerce services have led to a new security protocol known as a CAPTCHA, a challenge designed to exploit gaps in the perceptual abilities between humans and machines. In this paper, we propose a new paradigm for building CAPTCHA’s which offers simultaneous benefits to both online security and pattern recognition research. We illustrate our discu...