what is captcha

By now all of us at one time or another have had to read a construed image and type the letters and numbers we saw into a textbox. This test is what is known as a CAPTCHA, and it prevents bots (programs created to spam websites among other objectives) from submitting a form on a website. The reason it prevents bots from submitting a form (and its agenda) is because bots can't decipher the text within an image, and thus it cannot fill out the correct response in the textbox. Although there are ways around CAPTCHAs for the most sophisticated bots, you can be relatively sure that a form submission is from a human in using this test.


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Some of these captcha are so hard to figure out that I just skip going into that site - I thing the people who make them are sadists and they have a good laugh thinking about the people trying to figure them out - why use letters like C S P... that you cant tell if they're capital - It's like google ranking - It's a Power tool - makes them feel so important

CAPTCPA is mainly used to prevent automated software (bots) from performing actions on behalf of actual humans. For example while signing up for a new email account, you will come across a CAPTCHA at the end of the sign-up form so as to ensure that the form is filled out only by a legitimate human and not by any of the automated software or a computer bot.

Having captcha in your side is a great way of fending off spammers, in case you do not require doing the trouble of finding hem after the other. most forums and sites nowadays that offer membership have captcha to prevent spamming and site overload by bots, it is a nice investment for a first rate site.

A CAPTCHA is a program that can generate and grade tests that humans can pass. CAPTCHA is a type of challenge-response test used in computing as an attempt to ensure that the response is generated by a person. CAPTCHA stands for Completely Automated Public Turing Test to Tell Computers and Humans Apart'. Captcha Image verification,Captcha Image,Image Verification Code these are the names which represent Captcha code.

A CAPTCHA is a program that can generate and grade tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't:

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Originally Posted by Oracle

Captcha is something which was created to stop automated computer spam robots from filling out forms, harvesting email addresses, and then sending out countless spam emails.

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That's right i also add one thing that free captcha is available but they are not very effective to stop spam bots. so buy...

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 assumed to be unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human.


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The term Captcha is largely being used for upsetting the attempts of the spammers. In here an image is put which one has to write on a given box earlier than submitting something or before going on further.

The term Captcha is largely being used for upsetting the attempts of the spammers. In here an image is put which one has to write on a given box earlier than submitting something or before going on further.

Do anyone have idea about ReCaptcha?

Captcha is mainly used for thwarting the attempts of the spammers. Here an image is being placed which one has to write on a given box before submitting anything or before proceeding further.

The thing that we call as the CAPTCHA is something that we really see these days very frequently. However, are you aware of its real uses?

mainly Captcha option available when you register and do other security related work . captch work like a security. it prove that present user is human and not a spammer.

captcha contain words .it is used to prevent spamming and automated submissions.: fire :