A CAPTCHA (a backronym for Completely Automated Public Turing test to tell Computers and Humans Apart) is a type of challenge-response test used in computing to determine whether or not the user is human.

The term was founded in 2003 by Luis von Ahn, Manuel Blum, Nicholas J. Hopper, and John Langford.The most common type of CAPTCHA was first invented in 1997 by Mark D. Lillibridge, Martin Abadi, Krishna Bharat, and Andrei Z. Broder. This form of CAPTCHA requires that the user type the letters of a distorted image, sometimes with the additi ....etc

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CAPTCHA is a technique used to identify wether the user is a human or a BOT(called web robots), and it allows the humans to authenticate themselves by answering some simple questions.

while many techniques are used in captcha like text captcha , photo captcha, sound captcha etc; many of them were easily broken by spammers.like text captcha is a distorted image of containing some abnormal text, and with the help of OCR(Optical Character Reader) we could easily break the text captcha..

In this project create a control which is to be embedde ....etc

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to get information about the topic 3D CAPTCHA full report ,ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-captchas?page=2

http://seminarsprojects.net/Thread-captchas?page=3 ....etc

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I need seminar report on CAPTCHA , 3D CAPTCHA and all information regarding it .. ....etc

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Hi,
I am Anusha Sekar. I am in my final year of Computer Science Engineering.
I want to know if you have ppt presentation fro the topic- 3D CAPTCHA: A Next Generation of the CAPTCHA. Could you help me out with the presentation? If you already have the presentation, please mail me at [email protected].

Thank You ....etc

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to get information about the topic captcha security in phishing technology full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-captcha-security-for-phishing?pid=49604&mode=threaded

http://seminarsprojects.net/Thread-visual-security-is-feeble-for-anti-phishing ....etc

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To get full information or details of captcha please have a look on the pages

http://seminarsprojects.net/Thread-captcha-security-for-phishing?pid=49604&mode=threaded

http://seminarsprojects.net/Thread-captchas?page=2

http://seminarsprojects.net/Thread-captchas?page=3

http://seminarsprojects.net/Thread-captcha-project-report-free-download

if you again feel trouble on captcha please reply in that page and ask specific fields in captcha ....etc

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CAPTCHA Security: A Low-Cost Attack on a Microsoft CAPTCHA
SEMINAR REPORT
Submitted by
NARAYANAN V
DEPARTMENT OF COMPUTER SCIENCE & ENGINEERING
COLLEGE OF ENGINEERING TRIVANDRUM
2010





ABSTRACT

CAPTCHA is now almost a standard security technology. The most widely used CAPTCHAs rely on the sophisticated distortion of text images rendering them unrecognizable to the state of the art of pattern recognition techniques, and these text-based schemes have found widespread applicati ....etc

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how we generate code for captcha in website desiging


about captcha what it is,what are the advantages ,how to generate code for captcha ....etc

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An Alternative To Captcha - Video Captcha
B.Tech Seminar report
by
Nawas Abdulla
Department of Computer Science And Engineering
Government Engineering College, Thrissur
December 2010

report:


Abstract
Video Captcha is a new technique for using content based video as a CAPTCHA
task. These CAPTCHAs are presently generated from YouTube videos, which con-
tains tags supplied by the person while uploading that video. These videos are graded
using the given video ....etc

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