Description : We propose new techniques to combat the problem of click fraud in pay-per-click (PPC) systems. Rather than adopting the common approach of filtering out seemingly fraudulent clicks, we consider instead an affirmative approach that only accepts legitimate clicks, namely those validated through client authentication. Our system supports a new advertising model in which premium validated clicks assume higher value than ordinary clicks of more uncertain authenticity. Click validation in our system relies upon sites sharing evidence ....etc

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Usable security has unique usability challenges because the need
for security often means that standard human-computer-interaction
approaches cannot be directly applied. An important usability goal
for authentication systems is to support users in selecting better
passwords, thus increasing security by expanding the effective
password space. In click-based graphical passwords, poorly
chosen passwords lead to the emergence of hotspo ....etc

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Please suggest some applications on Cued Click Points.......please its urgent ....etc

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Various graphical password schemes have been proposed as alternatives to text-based passwords. Research and experience have shown that text-based passwords are fraught with both usability and security problems that make them less than desirable solutions. Psychology studies have revealed that the human brain is better at recognizing and recalling images than text graphical passwords are intended to capitalize on this human characteristic in hopes that by reducing the memory burden on users, coupled with a larger full password space offered by ....etc

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Graphical password authentication using cued click points
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Abstract—This paper presents an integrated evaluation of the Persuasive Cued Click-Points graphical password scheme, including usability and security evaluations, and implementation considerations. An important usability goal for knowledge-based authentication systems is to support users in selecting passwords of higher security, in the sense of being from an expanded effective security space. We use persuasion to influence user choice in click-based graphical passwords, encouraging users to select more random, and hence more difficult to gue ....etc

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