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Yan Captcha Service

Yan Captcha Service is aimed to provide a complete verification service for your application. The service is based on plain HTTP protocol, and written in pure Java.

Currently, Yan captcha service uses:

  • Servlet api
  • Guice as Injection container
  • Java2D to draw captcha image
  • Hsqldb to hold apikey data
  • Ehcache to store session, and jgroups to replicate session for cluster

Pages available are listed here:

Please feel free to request a writer permission and join in improving our documentation :)