Section 508
US federal accessibility requirements.
Scope
SCaptcha provides an accessible verification flow without image-based challenges, supporting Section 508 goals.
This page maps SCaptcha 2.3.0 behavior to the named framework. It is not a certification or legal advice.
Keyboard and focus support
SCaptcha focuses on keyboard-first interaction with predictable focus management.
The experience avoids visual puzzles that can block users relying on assistive technologies.
Screen reader compatibility
Clear status messaging and labels are designed to be read by assistive technologies.
Optional audio fallback offers a secondary channel when additional verification is required.
Content and feedback
Use clear, concise instructions around the widget and keep error feedback actionable.
Avoid custom styling that hides focus indicators or reduces contrast.
Implementation checklist
Test with keyboard-only navigation and screen readers, and confirm that verification remains usable on mobile.
Tune behavior checks to reduce false positives for users who interact differently.
SCaptcha 2.3.0 behavior
Each challenge uses its own cryptographically random 32-byte salt. Your WoltLab installation validates the salt, hash, algorithm, answer, and HMAC against the issuing session. The challenge expires after 60 seconds and does not require an external CAPTCHA provider.
This option is off by default. If you enable it, SCaptcha sends the visitor's public IP address to proxycheck.io for proxy, VPN, or Tor evidence. SCaptcha 2.3.0 sends tag=0 by default; administrators can opt in to provider logging. The IP address is transmitted for every lookup either way.
A pre-submit marker and the optional text/audio proof are valid for 5 minutes. Under-Attack mode uses a signed, user-agent-bound access cookie for 5 to 30 minutes; the default is 10. Sentinel can store a server-side rejection in a separate signed cookie for 10 minutes. Sentinel itself is off by default.
Request analytics are on by default. Logs can contain linkable operational data, including IP address, user agent, request, network and location fields, reasons, and submitted browser telemetry. Retention defaults to 90 days and can be set from 1 to 3,650 days. Turning analytics off stops new collection but does not erase existing rows or exports.
What operators need to review
Document enabled features, limit access to security logs, and assess optional external services separately. SCaptcha does not replace legal review or accessibility testing of the complete website.
Enable only the options you need. Update privacy and cookie notices, restrict access to analytics and logs, and test the actual form integration before launch.