Rock uses self-hosted CAPTCHA that utilizes PoW (Proof of Work) challenges to protect your system from large-scale bot attacks. To pick your Captcha Mode for all Captcha-enabled blocks, navigate to Admin Tools > Settings > System Configuration then select UI Settings. There are three Captcha Modes available for verification: Visible (default) – Requires user interaction to complete the CAPTCHA.Invisible – Automatically resolves in the background before allowing form submission.Disabled – Disables CAPTCHA enforcement. And that’s it! CAPTCHA comes out of the box with Rock to keep you protected. The Workflow Entry and Transaction Entry v2 blocks will automatically perform a Captcha validation when they’re visited.