Is it essential to use the captcha in the form?

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I’m completing a registration form, and I’ve taken some precautions against SQL Injection. And for the sake of aesthetics, I wouldn’t want to insert a captcha.

The form in question is for registration of users, who will login later.

My concern is that I had an experience, which I believe falls under the term "Flood", where I kept receiving several registrations of the same type, and as there was no data processing, the robot sent some links...

I take some risk for not inserting it, it is essential ?

  • Using captcha avoids: Flood, spam.

  • @Laerte has how to avoid this without captcha? For an aesthetic question..

  • Depends on the form. If it is something "dropped" by the web, captcha does not avoid a second-rate companies from sending propaganda, because they are humans who operate the system. On the other hand, if it is a login-protected form, it rarely needs.

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Well it is a choice of yours, you can suffer an attack, several bots making several requests at the same time, believe it happens until a small server I have gone through it.

You can do the following: Limit the number of times a given ip can use the form. If a certain user uses the form 5 times in a row you show a captcha to him, it only shows if he filled and made the request several times.

  • Good, it can indicate a way, for me to perform this procedure...

  • 1

    http://answall.com/questions/3571/qual-a-melhor-maneira-de-criar-um-sistema-de-login-com-php

  • vlw I will give a study...

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