Securimage CAPTCHA -Telling Humans and Computers Apart Automatically
A CAPTCHA is a program that can generate and grade tests that humans can pass but current computer programs cannot. For example, humans can read distorted text as the one shown below, but current computer programs can't:
Guidelines
If your website needs protection from abuse, it is recommended that you use a CAPTCHA. There are many CAPTCHA implementations, some better than others. The following guidelines are strongly recommended for any CAPTCHA
- Accessibility.
- Image Security.
- Script Security.
- Security Even After Wide-Spread Adoption.
