ADA
Accessible verification aligned with ADA expectations.
Scope
SCaptcha is designed to reduce accessibility barriers by avoiding image recognition tasks and supporting assistive technology users.
This page maps SCaptcha 2.3.0 behavior to the named framework. It is not a certification or legal advice.
Equal access by design
SCaptcha avoids image recognition puzzles that can exclude users with visual impairments.
Keyboard accessibility and screen reader friendly messaging keep the flow inclusive.
Configurable verification
Behavior checks and difficulty levels are configurable, helping reduce false positives for users who interact differently.
Under-Attack Mode can be scoped to high-risk periods so it does not become a permanent barrier.
Implementation checklist
Provide clear guidance on completing verification and keep fallback options enabled.
Review analytics for accessibility friction and tune configuration accordingly.
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.