外掛標籤
開發者團隊
② 後台搜尋「SOS Captcha — Privacy-First Spam Protection」→ 直接安裝（推薦）
原文外掛簡介
Stop spam without collecting visitor data.
SOS Captcha protects your WordPress forms with an interactive slider challenge. Visitors drag a handle along a track to prove they are human. The plugin runs entirely on your own server — no tracking, no cookies, no external services.
Privacy by design
No tracking pixels or analytics
No cookies stored
No data sent to external services
GDPR, CCPA, and ePrivacy friendly
All validation happens on your server
Visitor-friendly slider
Touch-friendly interaction works on mobile
Most visitors complete it in a few seconds
Smooth animation on success
How the protection works
Unique cryptographic tokens per session
Random checkpoint positions (up to 8 in Free, 15 in Premium)
Server-side timing validation
Rate limiting (configurable, 60s default)
Behavioral analysis (Premium)
Honeypot fields and browser fingerprinting (Premium)
Form integrations
Contact Form 7 (Free)
WordPress Comments (Free)
WPForms (Premium)
Gravity Forms (Premium)
Ninja Forms (Premium)
WooCommerce checkout, registration & reviews (Premium)
Authentication form protection (Premium)
WordPress login form (wp-login.php) — protect against brute-force attacks
User registration form — prevent bot-generated accounts
Lost-password form — block password-reset email spam
How it works
SOS presents a slider with randomly positioned checkpoints. Visitors slide a cursor along the track to activate each checkpoint in sequence. Each session generates unique cryptographic tokens with millions of possible combinations and server-side timing validation. Premium plans add behavioral analysis on top.
Free vs Premium
Free version includes:
Unlimited forms and submissions
Contact Form 7 integration
WordPress comments protection
Customizable appearance (colors, text)
Up to 8 checkpoints per challenge
Full GDPR compliance
Community support
Premium features:
WPForms, Gravity Forms, Ninja Forms integrations
WooCommerce protection (checkout, registration, reviews)
WordPress login, registration, and lost-password protection
Advanced behavioral detection
Browser fingerprinting
Honeypot fields
Local statistics dashboard (privacy-first, no data leaves your server)
Priority email support
White-label (remove badge)
Up to 15 checkpoints per challenge
Upgrade to Premium — from €4.99/month or €47/year.
Technical Highlights
Cryptographic security: Unique tokens per session with server-side validation
No database bloat: Uses WordPress transients (auto-cleanup)
Lightweight: Under 20KB total assets
Performance: Cached responses, minimal server load
Developer-friendly: Hooks and filters for customization
Translation-ready: 10 languages included (EN, FR, DE, ES, IT, PT-BR, AR, JA, ZH, HI)
Compliance
GDPR Article 25 (Privacy by Design)
CCPA compliant (no personal data collection)
ePrivacy Directive compliant (no cookies)
Support & Documentation
Documentation at https://sos-captcha.com
Community forum (Free)
Email support (Premium)
French and English support
Source Code
The plugin ZIP ships both the human-readable source (assets/challenge-slider.js, admin/js/sos-admin.js, assets/*.css, admin/css/*.css) and the minified production builds (.min.js, .min.css). WordPress loads the minified versions in production and the source versions when SCRIPT_DEBUG is enabled (define('SCRIPT_DEBUG', true) in wp-config.php).
Privacy Policy
SOS Captcha is designed with privacy at its core:
Data collection: None. We don’t collect, store, or transmit any personal data to external servers.
Cookies: None. The plugin sets no cookies.
External services: None. All processing happens on your WordPress server.
IP addresses: Not stored. Rate limiting uses transient hashes that auto-expire.
Statistics (Premium): Stored locally on your server only. Aggregated counters (blocked spam, form types) with no personally identifiable information.
Licensing (Premium only): When you activate a Premium license, your site URL and license key are sent to https://sos-captcha.com to validate the license. No user data is transmitted.
Hooks for Developers
sos_before_validation — Modify validation parameters
sos_challenge_created — React to new challenges
sos_spam_blocked — Trigger actions when spam is blocked
sos_should_show_badge — Control badge visibility
