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

Name: One-time_password.md Version: 1.0.0 Author: A'nil Cyborg Author URI: https://aliens.company…

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

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Row: 2543: Slug: One-time_password -->

Topic 1
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Infobox

📚 | Property | Detail | |---|---| | Full Name | One-Time Password | | Abbreviation | OTP |…
Topic 2
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History aur Background

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Push-based OTP — Approve/deny…

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Passkeys / FIDO2 — OTP ke…

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Adaptive auth — Risk-based…

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Lekin OTP abhi bhi sabse widely…

Topic 3
📥 ⚙️ 🔬 💡

OTP Kaise Kaam Karta Hai

🎯 Basic Flow 1. User action triggers OTP — Login, transaction, verification request 2.…
Topic 4
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Types of OTP

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Standard: RFC 4226

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Mechanism: Shared secret + counter…

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Counter: Har successful…

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Expiry: Counter-based — expire…

Topic 5
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OTP Types — Comparison Table

🔑 | OTP Type | Mechanism | Security Level | Code Travels Over Network? | Phishing…
Topic 6
✨ 📊 🔬

OTP Authentication Flow — Diagram

✨ `mermaid sequenceDiagram participant U as User participant App as Application participant…
Topic 7
📥 ⚙️ 🔬 💡

OTP Delivery Methods

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Sabse common delivery method…

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Mobile number pe 4-6 digit code…

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Pros: Universal (smartphone nahi…

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Cons: SIM swap attacks, SS7…

Topic 8
📥 📥 🧠 🔬 💡 🎯

OTP in Multi-Factor Authentication

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Something you know — Password, PIN

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Something you have — Phone (SMS…

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Something you are — Fingerprint,…

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Password alone = agar…

Topic 9
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Security Considerations

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TOTP/Authenticator apps prefer…

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Rate limiting on OTP attempts (3-5…

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Account lockout after multiple…

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OTP length minimum 6 digits (8…

Topic 10
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Standards aur Protocols

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Title: HMAC-Based One-Time…

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Published: December 2005

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Mechanism: HMAC-SHA1(secret,…

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Counter: Monotonically increasing;…

Topic 11
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OTP Best Practices

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OTP code ko never plaintext store…

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Rate limit OTP generation (prevent…

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OTP attempt limit enforce karo…

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Expiry strictly enforce karo —…

Topic 12
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Real-World Usage Examples

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UPI transactions: har payment par…

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Net banking login: password + OTP

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Credit card online transactions…

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Gmail: 2-Step Verification with…

Topic 13
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Glossary

🔑 | Term | Meaning | |---|---| | OTP | One-Time Password — single-use authentication code |…
Topic 14
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Disclaimer

✨ Ye article sirf educational aur informational purpose ke liye hai. Isme diye gaye facts,…
Topic 15
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ACC CodeFooter

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Article: One-Time Password

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Version: 1.0.0

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Author: A'nil Cyborg

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Generated: 2025

Comparison
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OTP Types — Comparison Table

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HOTP: Shared secret + counter

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TOTP: Shared secret + time

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SMS OTP: Random code via SMS

Diagram
📥 ⚙️ 🔬 💡

Visual Flow

📊 Diagram visualization — details in narration
Related Topics

See Also

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Multi-factor_authentication

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Two-factor_authentication

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TOTP

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HOTP

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Authentication

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Cryptography

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 1

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

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