Captcha without database

Synopsis

Using captcha without storing any information on the server side.

Description

This is a test application to try to make a protection by captcha for site's form. The following conditions must be met:

1. Сann't use third-party services, such as Google reCAPTCHA.
2. Сann't store any information on the server side.
3. Сann't install additional Perl modules.

Current status

Beta: A fully working version, but requiring explicit improvements.

TODO

1. Code review.
2. Tests.
3. Documentation.