captcha

I am new to Symfony2 but read about it very much. First of all, I am using symfony 2.1.7. And FOSUserBundle for user settings. I have already override fos_user-login template, with username and password. But I want to add a captcha for log in. I have seen GregwarCaptchaBundle, and according to document, new field should be added to FormType. And my question comes: Where is the symfony or FOSUserBundle login form type, that i can add this new field, or override it? There exists ChangePasswordFormType, ProfileFormType... etc. but no LoginFOrmType. May be it is so obvious but i did not get the

I'm getting problems with spam entries in my database through signup form. I have tried many open source Captcha solution, but still facing same problem. I am therefore looking for an alternative solution. What about the solution, where users would have to input the answer to a question? The answer to the question will be a server-side specific word then would this surely defeat a spambot? Would it be better to have a series of simple randomized questions or something like "6 + ? = 9" be better as a question? The only thing that concerns me is that if it's as easy as this to protect a signup

Has anyone been able to successfully prevent spam on their site without placing a burden on your visitor (e.g. CAPTCHA) and without using a centralized spam reporting system (e.g. Akismet) I've found this & it looks promising, but doesn't contain detailed deployment instructions. I want to present my web forms without burdening my users with CAPTCHA like technologies, but also actively automate preventing spam. There doesn't seem to exist a detailed instruction/tutorial on how to implement such a technology. Disclaimer Also, I realize there no silver bullet appropriate to preventing spam. But

This post refers to Google ReCaptcha v2 (not the latest version) Recently Google introduced a simplified "captcha" verification system ( video ) that enables users to pass the "captcha" just by clicking on it. But how can it differentiate a bot from a person just by a click? As per this answer , (assuming a similar implementation), at first "recaptcha" generates a hidden key and attaches it to a hidden input element and also lazily renders a check box (not an actual check box input but a div ) with the same key which when clicked, sends an asynchronous request (XHR) to the Google backend