captcha

How websites like Facebook and Twitter are protected against bot during registration? I mean, there's no captcha at all on the signup form? I want to create a signup form for a project, and I don't want bot during registration and Captchas are often ugly.. edit: My question is really during the registration because I know Facebook use Captchas once registred for the first time. Facebook uses some sort of hidden spam protection, if you view source of sign-up form you will see things like: class="hidden_elem"><div class="fsl fwb">Security Check</div>This is a standard security test that we use

I want to limit the failed login attempts. For example, if a specific user attempt to login with wrong username or password 4 times, i should show the CAPTCHA 4th time instead of blocking for some specific time, and keep showing CAPTCHA unless he supplies valid username and password. Once the user has successfully logged in, the login attempt is reset to ZERO. Is the idea of checking the username instead of IP address OK in security point of view? Can this approach be implemented without using database?, as I think I don't need to store time because i will just show recaptcha? Please give your

What is the best unobtrusive CAPTCHA for web forms? One that does not involve a UI, rather a non-UI Turing test. I have seen a simple example of a non UI CAPTCHA like the Nobot control from Microsoft. I am looking for a CAPTCHA that does not ask the user any question in any form. No riddles, no what's in this image. I think you might be alluding to an "invisible" captcha. Check out the Subkismet project for an invisible captcha implementation. http://www.codeplex.com/subkismet Try akismet from wp guys I think asking the user simple questions like: "How many legs does a dog have?" Would be much

运行环境介绍 分开安装了apt-get install nginx |php |mysql 问题一：报错404 Not Found 解决办法： location / { #try_files $uri $uri/ =404; #try_files $uri $uri/ /index.php?$query_string; if (!-e $request_filename){ rewrite ^(.*)$ /index.php?s=$1 last; break; } } 问题二：验证码出不来,报错显示 致命错误: Call to undefined function think\captcha\imagecreate()，其根本解决办法就是安装gd库！导致登录处的刷新验证刷新不出来 Ubuntu安装 sudo apt-get install php7.2-gd 来源： oschina 链接： https://my.oschina.net/u/3766399/blog/2980994

I have a simple reg form (Name, Email, Password) on my website and im looking to implement some sort of anti-bot/spam protection, Captcha seems like a very long winded way, plus they really annoy me when I see them on sites. Has anybody an alternative method to protecting against spam which is lightweight and simply integrated? One alternative is to use a hidden form field as a honeypot for bots. This field can be filled using an appropriate value from Javascript, or it can just be left blank. Either way, if the value isn't what you expect, then you can treat the submission as spam. This won't

I googled for integration of Captcha in iOS app but do not found any relevant way to do so. Even i sign up with reCAPTCHA and searched whether the plugins for Captcha are available for iOS or not? I didn't found any plugin for iOS there. Somewhere while RND i come to know that "its not needed for the mobile apps" , But the client wants the Captcha in his application so ,I want to know :- Whether we can integrate the Captcha in iOS App/Mobile Apps :- If Yes? : Then what would be the relevant way to integrate it. If No? : Then what is the relevant reason . For my I use the following library:

See the demo of JQuery Qaptcha here - http://www.myjqueryplugins.com/QapTcha/demo It requires you to slide the slider to unlock and prove you're human. I've read all about how it's setting random field values and erasing them, but isn't all that done via a javascript call? And if so then wouldn't a bot just need to run the javascript method and then the qaptcha is broken? Help me understand how this is secure... Unfortunately, this does not appear to be a secure captcha. At the end of this post is some sample code that can bypass it. I wrote this script without looking at any of their source

We are trying to build a jmeter testcase which does the following: login to a system obtain some information and check whether correct. Where we are facing issues is because there is a captcha while logging into the system. What we had planned to do was to download the captcha link and display, and wait for user to type in the value. Once done, everything goes as usual. We couldnt find any plugin that can do the same? Other than writing our own plugin, is there any option here? Since CAPTHA used to detect non-humans, JMeter will always fail it. You have to make a workaround in your software: