CAPTCHA is tell an acronym for Completely Automated Public Turing test to tell Computers and Humans Apart. It will be used to find a distinction between humans and machine. CAPTCHAs are usually Challenge-Response-Tests, with which the asked one must solve a task (Challenge) and which send back result (Response). The posed tasks are so that they are to be simply solved for humans, very difficult for computers. At present usually picture-based CAPTCHAs are used.
Possible use cases are services, with which Bots can manipulate or abuse the service, as for instance on-line inquiries, guest books, registering E-Mail addresses (by those Spam can to be sent) or log in entrances. 
The now available captcha service "YourCaptcha" is one these picture-based CAPTCHAs. It is characterised by an easy integration with the help of a simple <IMG SRC='...'> HTML tag on the own Website. The correct character input is checked over a simple ASP.NET Webservice.
Additional feature list:
- The use of different character fonts
- Rotation and deformation of the individual characters
- Overlapping random pattern
et cetera ... Information about a 30-day trial version : MacReeg@gmail.com
2 Kommentare:
Heisst das, DU hast einen eigenen Captcha-Service geschrieben?
Respekt.
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