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Copyright (c) A|iens. All rights reserved.

============================================================================ Article Name : CAPTCHA…

Overview
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Copyright (c) A|iens. All rights reserved. — Quick Facts

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Property: Detail

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Full Name: Completely Automated Public Turing…

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Acronym: CAPTCHA

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Type: Human verification /…

Topic 1
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Infobox

📚 | Property | Detail | |---|---| | Full Name | Completely Automated Public Turing test to…
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History and Evolution

💡 Timeline | Year | Milestone | |---|---| | 1950 | Alan Turing ne "Turing Test" propose…
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How CAPTCHA Works

🎯 `mermaid sequenceDiagram participant User as User (Browser) participant App as Web…
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Types of CAPTCHA

⭐ | Type | How It Works | Pros | Cons | Example | |---|---|---|---|---| | Text-Based |…
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CAPTCHA Providers Comparison

🔑 | Feature | Google reCAPTCHA v2 | Google reCAPTCHA v3 | hCaptcha | Cloudflare Turnstile |…
Topic 6
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CAPTCHA vs Bot Attacks

✨ Why Bots Attack | Attack Type | Kya Karte Hain | Impact | |---|---|---| | Credential…
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Accessibility Concerns

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WCAG 2.1 Success Criterion 1.1.1 —…

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Multiple modalities — Visual +…

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No cognitive ability test —…

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Privacy Considerations

🚀 Data Collection Concerns | Provider | Data Collected | Concern Level | |---|---|---| |…
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When to Use CAPTCHA

📚 Use CAPTCHA Here (Recommended) | Location | Why | |---|---| | Login Form | Credential…
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Real-World Implementation Patterns

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First 5 login attempts: no CAPTCHA

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6th-10th attempt: CAPTCHA appears

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10+ attempts: temporary IP block…

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50+ attempts (same IP/day):…

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5 Common Mistakes

🎯 Mistake 1: Sirf Client-Side CAPTCHA Validation CAPTCHA token client-side JavaScript me…
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6 Best Practices

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Per-IP rate limit (e.g., 10 login…

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Per-account rate limit (e.g., 5…

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Global rate limit (e.g., 1000…

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Timeout set karo — agar CAPTCHA…

Topic 13
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Interview Questions

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v3 default use karo — best UX,…

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v2 fallback ke taur pe use karo —…

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Combined approach ideal hai — v3…

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Glossary

✨ | # | Term | Definition | |---|---|---| | 1 | CAPTCHA | Completely Automated Public…
Comparison
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CAPTCHA Providers Comparison

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Type: Checkbox + image fallback

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User Interaction: Click + sometimes…

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UX Friction: Low-Medium

Comparison
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CAPTCHA vs Bot Attacks

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Credential Stuffing: Leaked…

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Brute Force: Password guess karte hain…

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Spam: Fake comments, reviews, contact…

Diagram
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Visual Flow

📊 Diagram visualization — details in narration
Related Topics

See Also

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Authentication

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Authorization

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Bot

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Brute Force Attack

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Rate Limiting

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Web Scraping

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 1

Copyright (c) A|iens. All rights reserved. ka sabse sahi definition kya hai?

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 2

Copyright (c) A|iens. All rights reserved. ka 'Full Name' kya hai?

Complete! 🎉
COMPLETE

Copyright (c) A|iens. All rights reserved. Complete!

Aliens Wiki · HIEN · Cinematic Knowledge

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Copyright (c) A|iens. All rights reserved. Complete

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Authentication

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