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Thread: what is captcha

  1. #46
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    Hi,
    A CAPTCHA is the code which is protect by the spams.



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  2. #47
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    Quote Originally Posted by happy View Post
    hello friends, can any body tell me about captcha. And can any body help me how to put it in my website. thanks for help...
    If you work at a website design company (as your signature would suggest) it is hard to believe you wouldn't know what captcha was, but...
    If you look it up in the dictionary, it will say:
    captcha -
    1. pain in the rear.
    2. a necessary evil.
    It works to stop spammers (at least machines) but it can be very frustrating to us humans that don't see so well.

  3. #48
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    In a CAPTCHA test (an acronym for "Completely Automated Public Turing test to tell Computers and Humans Apart," also sometimes spelled in lowercase), an image of letters is dynamically generated. The letters, because they're part of an image and not text (e.g. text that you could cut and paste), are difficult for a spambot or other computer program to read. Yet, a person has little trouble reading the letters in a captcha image.Using a captcha test on a website is a great way to ensure, for instance, that a person and not a spambot is filling out a web form. Also, a captcha can make it difficult for a person to continuously resubmit form information and overwhelm the form's purpose.
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  4. #49
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    Hi........,

    I my opinion CAPTCHA is a code which is used to stop automated computer Spam robots from filling out forms, harvesting email addresses, and then sending out countless Spam emails. And it is best one.

  5. #50
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    CAPTCHA is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. 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 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.

  6. #51
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    CAPTCHA stands for Completely Automated public turing Test To Tell Computers and Humans Apart. It is a program that can generate and grade tests that humans can pass but current computer programs cannot.

  7. #52
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    in simple word CAPTCHA can stop Auto 0r Computrised submitter of spam to your site, it verify a human visitor on your site.

  8. #53
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    Here is a helpful blog that I have found that helped me that sums it up nicely:
    http://www.winworld.com/blog/17-blog...spamerzzz.html

  9. #54
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    Captcha is a program developed to bring a halt on filling forms, harvesting email addresses, and sending countless spam emails. I haven’t used it personally.

  10. #55
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    CAPTCHA code 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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    Last edited by dillan598; 07-10-2010 at 03:12 AM.

  11. #56
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    having captcha in your side is a pretty good way of fending off spammers, especially if you do not want to do the hassle of finding hem one by one. most forums and sites nowadays that offer membership have captcha to prevent spamming and site overload by bots, it's a pretty good investment for a decent site

  12. #57
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    I believe that first of all you need to do the search for it. As usual that is paid
    So are you ready to pay for the captcha?
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  13. #58
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    CAPTCPA is mainly used to avoid automated software from performing actions on behalf of actual humans. It is mostly used for embarrassed the attempt of the spammers. CAPTCHAs are mainly used by websites that proffer services.

  14. #59
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    A Captcha is a type of challenge-response test used in computing to ensure that the response is not generated by a computer. 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 unable to solve the CAPTCHA, any user entering a correct solution is presumed to be human.

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    Last edited by ebbenezer66; 07-31-2010 at 05:35 AM.

  15. #60
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    Captcha is an automatically word, a collection different alphabets or digits, to secure any operation.

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