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Ed25519

Ed25519 ek high-speed, high-security digital signature algorithm hai jo Curve25519 elliptic curve…

Overview
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Ed25519 — Quick Facts

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Property: Detail

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Full Name: Edwards-curve Digital Signature…

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Category: Cryptography / Digital Signatures…

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Designed By: Daniel J. Bernstein, Niels Duif,…

Topic 1
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Kya Hai Ed25519

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Ed = Edwards curve (special type…

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25519 = Curve25519 (specific curve…

Topic 2
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Analogy — Fingerprint Scanners

💡 | Old Scanner (RSA/ECDSA) | New Scanner (Ed25519) | Difference | |---|---|---| | Bada…
Topic 3
📥 📥 🧠 🔬 💡 🎯

Kyun Banaya Gaya

🎯 ECDSA ke problems jo Ed25519 solve karta hai: 1. Nonce reuse vulnerability — ECDSA me…
Topic 4
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Kaise Kaam Karta Hai

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32 random bytes generate karo →…

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Seed ka SHA-512 hash nikalo →…

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Scalar ko curve ke base point se…

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Message + private key seed ka…

Topic 5
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Key Generation, Signing aur Verification

🔑 `mermaid flowchart TB subgraph "Key Generation (one-time)" SEED[Random Seed<br/>32 bytes…
Topic 6
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Ed25519 vs ECDSA vs RSA

✨ | Aspect | Ed25519 | ECDSA (P-256) | RSA-2048 | |---|---|---|---| | Key Size | 32 bytes…
Topic 7
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Key Properties

🌟 | Property | Detail | Kyun Important | |---|---|---| | Deterministic signing | Same…
Topic 8
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Kahan Use Hota Hai

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ssh-keygen -t ed25519 — most…

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GitHub, GitLab, Bitbucket sab…

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Default recommendation OpenSSH…

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TLS 1.3 me Ed25519 certificates…

Topic 9
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Security Advantages

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Developer ko nonce generate nahi…

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Curve hardcoded hai — weak curve…

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Key clamping built-in — certain…

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Constant-time by design — timing…

Topic 10
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Limitations

💡 1. No encryption — Ed25519 sirf signing ke liye hai. Encryption ke liye X25519…
Topic 11
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Best Practices

🎯 1. SSH me Ed25519 use karo — RSA/ECDSA se switch karo: ssh-keygen -t ed25519 2. Seed…
Comparison
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Ed25519 vs ECDSA vs RSA

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Key Size: 32 bytes (256-bit)

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Signature Size: 64 bytes

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Security Level: ~128-bit

Diagram
📥 ⚙️ 🔬 💡

Visual Flow

📊 Diagram visualization — details in narration
Related Topics

See Also

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ECDSA

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Elliptic_curve_cryptography

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Digital_signature

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Curve25519

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Public_key_cryptography

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SSH

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 1

Ed25519 ka sabse sahi definition kya hai?

Quick Quiz
🧠 QUIZ TIME

Quiz — Question 2

Ed25519 ka 'Full Name' kya hai?

Complete! 🎉
COMPLETE

Ed25519 Complete!

Aliens Wiki · HIEN · Cinematic Knowledge

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Ed25519 Complete

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ECDSA

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