Captcha

If i suggest this topic for seminar Your really think ,i am a fool .Than i will ask you what you know about captcha.

suppose you know ...

1)The captcha is only picture.The picture contain element type than only enter to the secured webpage.
2)Its a human verification code.

Ya,I will agree these points. How can use more advanced......

Example :

If you are owner of a website .That contain posting comment .The comment will be publishing Through spam .Than you can increase the number of spam but you will not got good benefits.
You can try the captcha.your monthly bandwidth will be decrease the use of spam ..
we can use spam detection method .

If i will suggest Captcha will include all the your own application but it will be also simple .The captcha not only picture you can try with simple maths

5+2 = , 4+9= 7+3= 8 +1=

You can try with like this but it will be simple .another wise you will affect your traffic

The possibilities of captcha is very strong ......

Abstract

A CAPTCHA is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person. The process usually involves one computer (a server) asking a user to complete a simple test which the computer is able to generate and grade. Because other computers are supposedly unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human. Thus, it is sometimes described as a reverse Turing test, because it is administered by a machine and targeted to a human, in contrast to the standard Turing test that is typically administered by a human and targeted to a machine. A common type of CAPTCHA requires the user to type letters or digits from a distorted image that appears on the screen.

Realated topic

captcha	web security
captcha google	captcha generator
email captcha	captcha script
ajax captcha	captcha codes
captcha security	animated captcha

If you Have More ideas about captcha then please post your ideas.....
How we can protect web security from spammers.............? you can choose this topic for seminar