🔐 RSA Key Generator

About RSA Key Generator

RSA (Rivest–Shamir–Adleman) is a public-key cryptosystem widely used for secure data transmission. This tool generates RSA key pairs consisting of a public key for encryption and a private key for decryption, all processed securely in your browser.

What is RSA Encryption?

RSA is an asymmetric cryptographic algorithm that uses two different keys: a public key that can be shared openly and a private key that must be kept secret. Data encrypted with the public key can only be decrypted with the corresponding private key, making it ideal for secure communications.

Common Use Cases

• SSH Authentication: Secure shell access to remote servers without passwords
• SSL/TLS Certificates: Secure HTTPS connections for websites
• Email Encryption: Secure email communications using PGP/GPG
• Digital Signatures: Verify authenticity and integrity of documents
• API Authentication: Secure authentication for web services and APIs
• File Encryption: Protect sensitive files and data

Choosing the Right Key Size

• 2048-bit: Current industry standard, fast generation, adequate security for most applications
• 3072-bit: Enhanced security for sensitive data, recommended for long-term protection
• 4096-bit: Maximum security for highly sensitive operations, slower but most secure

How to Use This Tool

1. Select your desired key size from the dropdown menu
2. Click "Generate RSA Keys" to create your key pair
3. Copy or download your public and private keys
4. Store your private key securely (never share it!)
5. Share your public key as needed for encryption or verification

Understanding PEM Format

PEM (Privacy Enhanced Mail) is a base64-encoded format for storing and transmitting cryptographic keys and certificates. The format begins with headers like "-----BEGIN PUBLIC KEY-----" and is widely supported across different platforms and applications.

Key Security Best Practices

• Always generate keys on a trusted, secure device
• Store private keys encrypted with a strong passphrase
• Never transmit private keys over unencrypted channels
• Create regular backups of your private keys
• Rotate keys periodically for enhanced security
• Use hardware security modules (HSM) for production environments

Technical Specifications

This tool uses the Web Crypto API to generate RSA-OAEP key pairs with SHA-256 hashing. All cryptographic operations are performed locally in your browser using industry-standard algorithms, ensuring maximum security and privacy.