Enhance Joomla form security with the Captcha - Hashcash plugin. This free tool uses lightweight, client-side proof-of-work to block spam bots without user interaction. It integrates seamlessly with Joomla’s core captcha system, protecting forms like login, registration, or contact pages. Ideal for reducing spam while maintaining user experience.
Extension Page: Captcha - HashCash
| Maturity | Stable |
| Released on | Friday, 14 February 2025 |
Switched from CryptoJS to Subtle.Crypto within the Web Cryptography API.
| Maturity | Stable |
| Released on | Monday, 03 March 2025 |
Cleaned up some of the code, used internal Joomla IP detection, cleaned up captcha label hiding and removed JS/CSS being used to hide captcha label.
| Maturity | Stable |
| Released on | Tuesday, 04 March 2025 |
last release broke the IP test within the captcha
| Maturity | Stable |
| Released on | Sunday, 09 March 2025 |
even more robust bot detection - I found a pinhole, and sealed it
| Maturity | Stable |
| Released on | Sunday, 09 March 2025 |
Update JS bot detection reporting
| Maturity | Stable |
| Released on | Monday, 10 March 2025 |
refactored the javascript to include several more bot tests
| Maturity | Stable |
| Released on | Friday, 14 March 2025 |
Adds form decorators to the plugin, disabling the submit button and adding a spinner while the captcha remains unsolved.
| Maturity | Stable |
| Released on | Friday, 14 March 2025 |
Added more form decorator scripts, covering com_users registration, lost password, and forgot username forms.