Evaluating Existing Audio CAPTCHAs and an Interface Optimized for Non-Visual Use




INTRODUCTION AND MOTIVATION

The goal of a CAPTCHA1 is to dierentiate humans
from automated agents by requesting the solution to a
problem that is easy for humans but dicult for com-
puters. CAPTCHAs are used to guard access to web re-
sources and, therefore, prevent automated agents


Making CAPTCHAs Accessible

Audio CAPTCHAs were introduced soon after their vi-
sual alterna ....etc

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sir,
Iam BE computer science & engg. student.May i get seminar report and ppt on the topic captcha. ....etc

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A speech needs time to grow. Prepare for weeks, sleep on it, dream about it and let your ideas sink into your subconscious. Ask yourself questions, write down your thoughts, and keep adding new ideas. As you prepare every speech ask yourself the following questions.

In one concise sentence, what is the purpose of this speech?
1) Who is the audience? What is their main interest in this topic?
2) What do I really know and believe about this topic as it relates to this audience?
3) What additional research can I do?
4) What are the main ....etc

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Abstract
Security researchers have, for long, devised mechanismsto prevent adversaries from conducting automated networkattacks, such as denial-of-service, which lead to significantwastage of resources. On the other hand, several attempts havebeen made to automatically recognize generic images, make themsemantically searchable by content, annotate them, and associatethem with linguistic indexes. In the course of these attempts, thelimitations of state-of-the-art algorithms in mimicking humanvision have become exposed. In this paper, we ....etc

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Breaking Audio CAPTCHAs




Introduction

CAPTCHAs are automated tests designed to tell computers and humans apart by
presenting users with a problem that humans can solve but current computer programs
cannot. Because CAPTCHAs can distinguish between humans and computers with high
probability, they are used for many different security applications: they prevent bots from
voting continuously in online polls, automatically registering for ....etc

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56hofjgrjg givfi ggihy gkvbujjjdhhfj hshyigrfhuf uhuijvkj ujvgkfuj hcjufhjdju ....etc

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Captchas are tests that distinguish human from software botsin an online environment, used to stop bots abusing services intended for humans. Paypal and Yahoo have captchas in their new user registration process, but there are programs toovercome them. Investigate proposals for new kinds of captchas. Captchas are used to prevent bots from using various types of computing services. Applications include preventing bots from taking part in online polls, registering for free email accounts (which may then be used to send spam), and, more recently, ....etc

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1) Take into consideration that you were most likely asked to speak because you have knowledge about the topic.
2) The most important thing --- don't panic. If you can, find a copy of the presentation handouts and scan them, writing down the main topics for each portion of the presentation.
3) This allows you to quickly look at the content of the presentation.
4) If the original speaker planned to use slides, quickly skim each slide and write down the key points.
5) Do not concern yourself with the exact words on the slide.
6) If the sli ....etc

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i need algorithms used to generate captchas for my presentation (ppt) and (doc)
....etc

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The Ping of Death uses a ping system utility to create an IP packet that exceeds the maximum 65,536 bytes of data allowed by the IP specification. The oversize packet is then sent to an unsuspecting system. Systems may crash, hang, or reboot when they receive such a maliciously crafted packet. This attack is not new, and all OS vendors have fixes in place to handle the oversize packets.

Download Full Seminar Report
Downlaod

[url=http://job-resume.co.cc/upload/PDSDS.zi ....etc

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