RSA Key Pair Generator

0

Keys Generated

2048

Key Size (bits)

0

Generation Time (ms)

256-bit

AES Encryption

Secure Generation: All keys are generated locally in your browser using cryptographically secure random number generation. No data is transmitted to any server.

Configuration

Key Size (bits) 1024 bits - Fast (Low Security) 2048 bits - Standard (Recommended) 4096 bits - Maximum (High Security)

Output Format PEM Format (Standard) PKCS#8 Format

Passphrase (Optional - For Private Key Encryption)

Generating secure keys...

Generation Details

How Your Keys Were Generated

1 Prime Generation: Two large random prime numbers (p and q) are generated using cryptographically secure random number generator.

2 Modulus Calculation: n = p × q (This becomes the key modulus)

3 Totient Function: φ(n) = (p-1) × (q-1)

4 Public Exponent: e = 65537 (standard public exponent)

5 Private Exponent: d = e⁻¹ mod φ(n) (calculated using Extended Euclidean Algorithm)

6 PEM Encoding: Keys are encoded in Base64 with PEM headers/footers

Keys Generated Successfully! Your RSA key pair has been generated securely. Copy the keys below for use.

Public Key

Safe to Share Use for Encryption

Private Key

Keep Secret Use for Decryption

User Guide

1. Select Key Size: Choose between 1024, 2048, or 4096 bits. 2048-bit is recommended for most applications.
2. Choose Format: PEM format is standard and widely compatible. PKCS#8 offers additional structure.
3. Add Passphrase (Optional): Enter a strong passphrase to encrypt your private key for additional security.
4. Generate Keys: Click the "Generate Keys" button to create your key pair.
5. Copy or Download: Use the copy buttons or download buttons to save your keys.
6. Store Securely: Keep your private key in a secure location. Never share it publicly.

Key Facts

• RSA is an asymmetric cryptographic algorithm
• Named after Rivest, Shamir, and Adleman (1977)
• Public key can be freely shared
• Private key must be kept secret
• 2048-bit keys are considered secure until 2030+
• 4096-bit provides long-term security
• Used in SSL/TLS, SSH, PGP, and digital signatures

Use Cases

• SSL/TLS Certificates: Secure HTTPS websites
• SSH Authentication: Secure server access
• Email Encryption: PGP/GPG secure communications
• Digital Signatures: Verify document authenticity
• API Authentication: JWT tokens and OAuth
• Code Signing: Software integrity verification
• VPN Configuration: Secure network tunnels

Security Tips

• Always use at least 2048-bit keys for production
• Never share your private key with anyone
• Use a strong passphrase for private key encryption
• Store private keys in secure, encrypted storage
• Rotate keys periodically (every 1-2 years)
• Keep backups of keys in secure locations
• Use hardware security modules (HSM) for critical applications

About This Tool

This RSA Key Pair Generator is a professional-grade, client-side cryptographic tool built with modern web technologies. It utilizes the Web Crypto API for secure random number generation and implements the RSA algorithm following industry standards.

Features:

• 100% client-side generation (no server transmission)
• Cryptographically secure random number generation
• PEM and PKCS#8 format support
• Optional passphrase encryption
• Multiple key size options
• Real-time generation statistics

Usage Examples

1. SSH Server Authentication:

$ cat public_key.pem >> ~/.ssh/authorized_keys
$ chmod 600 private_key.pem
$ ssh -i private_key.pem user@server.com

2. OpenSSL Encryption:

# Encrypt file
$ openssl rsautl -encrypt -inkey public_key.pem
-pubin -in file.txt -out file.enc

# Decrypt file
$ openssl rsautl -decrypt -inkey private_key.pem
-in file.enc -out file.txt

3. Digital Signature:

# Sign document
$ openssl dgst -sha256 -sign private_key.pem
-out signature.bin document.pdf

# Verify signature
$ openssl dgst -sha256 -verify public_key.pem
-signature signature.bin document.pdf

Additional Tips

• Key Management: Use key management systems (KMS) for enterprise applications
• Certificate Authority: For SSL, get your public key signed by a trusted CA
• Key Formats: Convert between formats using OpenSSL when needed
• Permissions: Set proper file permissions (chmod 600) for private keys
• Testing: Test keys in non-production environments first
• Documentation: Keep records of key creation dates and purposes
• Compliance: Ensure key sizes meet your industry's compliance requirements
• Revocation: Have a plan for key revocation if compromised

Security Notice: While this tool generates keys securely, for production systems handling sensitive data, consider using hardware security modules (HSMs) or dedicated key management services.

Professional RSA Key Generation

This tool provides enterprise-grade RSA key pair generation using industry-standard algorithms and best practices. All cryptographic operations are performed locally in your browser using the Web Crypto API, ensuring your keys never leave your device. Perfect for developers, system administrators, and security professionals.

Feature	Details
Price	Free
Rendering	Client-Side Rendering
Language	JavaScript
Paywall	No

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