Hashcash is a module which implements the Hashcash algorithm to help protect sites from spam. This module is similar to the popular wordpress plugin wp-hashcash.

Administrators are able to specify which roles need to pass a Hashcash check, and also which forms should have the hashcash check inserted into them

This module works with aggressive caching mechanisms employed by modules like Boost.

Initial development of this module was carried out by Simon Rycroft, funded by the Scratchpads project. The 8.x version of the module has been created by Thomas Gielfeldt.

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