My ramblings on web development, internet startups, ecommerce, international trade,
my travels, sometimes politics, and whatever else I just feel like writing about :)
my travels, sometimes politics, and whatever else I just feel like writing about :)
Sep 2011 18
Different Types of CAPTCHA0
Posted In Web Development
Recently I needed to improve CAPTCHA on a website. Here are the different types of CAPTCHAs I found.
- Web Service (Google reCAPTCHA)
- Locally-Run (Securimage PHP CAPTCHA)
- CSS (Honeypot / Invisible) CAPTCHA
- Video CAPTCHA (NuCAPTCHA)
- Math CAPTCHA (generate 2 numbers to add or something else only humans can evaluate and have them enter the correct value in another field)
Personally, the CSS CAPTCHA is the most elegant since users won’t even see any CAPTCHA field.
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