Abstract.
We introduce captcha, an automated test that humans can pass, but current computer programs canâ„¢t pass: any program that has high success over a captcha can be used to solve an unsolved Arti?- cial Intelligence (AI) problem. We provide several novel constructions of captchas. Since captchas have many applications in practical secu- rity, our approach introduces a new class of hard problems that can be exploited for security purposes. Much like research in cryptography has had a positive impact on algorithms for factoring and ....etc

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i want audio captcha existing solution assesment and implementation over voip telephony synopsis and seminar report ....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 widespr ....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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Seminar Report onAudio CAPTCHA: Existing solutions assessment and It’s Advancements
What are CAPTCHAs?
Completely Automated Public Test to Tell Computers and Humans Apart.
Web-based protection mechanisms
Only humans allowed to perform certain tasks
Opening E-mail accounts
Voting on-line, etc.
Prevent automated attacks by bots
To avoid eating up resources
To avoid biasing results, etc.
Most current systems - text-based.
Why there came a need for Captchas???
Preventing Comment Spam in Blogs. 
Protec ....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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ppl can u please help abt the topic for the seminars....
I needed a ppt or a pdf for the same..
Thanks ....etc

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audio captcha seminar report documentation

Thanks & Regards.
Rajendar.B ....etc

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Abstract:

Digital audio broadcasting, DAB, is the most fundamental advancement in radio technology since that introduction of FM stereo radio. It gives listeners interference - free reception of CD quality sound, easy to use radios, and the potential for wider listening choice through many additional stations and services.

DAB is a reliable multi service digital broadcasting system for reception by mobile, portable and fixed receivers with a simple, non-directional antenna. It can be operated at any frequency from 30 MHz ....etc

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