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i hate captcha, do you think there is a better solution
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Currently there are more than twenty vendors providing CAPTCHAs, with reCAPTCHA from Google in use on more than 6 million websites. The technology has been around for a while, and it's well ingrained as a normal part of doing business on the internet.
About reCAPTCHA reCAPTCHA is a free service from Google that helps protect websites from spam and abuse. A “CAPTCHA” is a turing test to tell human and bots apart. It is easy for humans to solve, but hard for “bots” and other malicious software to figure out.
One of the most common reasons why this error occurs is that of an outdated Chrome version. reCAPTCHA will actively look at the browser version before allowing you access. This is applicable to all browser versions, not just Chrome. In this case, the solution is to update Google Chrome to the latest version.
Mathematical questions are becoming increasingly popular
e.g. : what is 3 + 2?
These are often easier to read than captchas which can be very confusing for some users.
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You may check Practical non-image based CAPTCHA approaches?
I asked a question earlier Need suggestions/ideas for easy-to-use but secure captchas
However if you are irritated due to the difficulty faced by users because of the very existence of captchas, then there has been a lot of debate over this and people are still trying hard to come up with a universal solution which can work even for very popular sites.
You should see http://nedbatchelder.com/text/stopbots.html for implementation of Negative captchas. But sadly, this is not effective as yet for site specific spam attacks (when your site gets very popular) as far as I have understood. The author says he has been using these techniques successfully for less popular sites. The overall conclusion with the state-of-the-art negative captchas is that whatever technique you use, spammers can program their bots to crack it in some time if they target your site. And they will probably target your site when it gets very popular. But you can definitely use them till your site is not very popular.
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