RSA Key Pair Generator

Understanding RSA Asymmetric Cryptography

RSA (Rivest–Shamir–Adleman) is an asymmetric cryptographic system that relies on the mathematical difficulty of factoring large prime numbers. Unlike symmetric ciphers where both parties share a single secret key, RSA generates a mathematically linked key pair:

• Public Key (SPKI): Distributed freely to clients, third-party APIs, and browsers. Anyone can use the public key to encrypt confidential payloads or verify digital signatures.
• Private Key (PKCS#8): Kept strictly secret by the owner. Only the private key can decrypt messages encrypted with the public key or produce authentic cryptographic signatures.

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How to Use It

1. Select Bit Strength: Choose 2048-bit for standard web applications, SSH access, and JWT tokens, or 4096-bit for long-term root certificate authorities or high-assurance compliance.
2. Generate Key Pair: Click Generate New RSA Key Pair. Your browser will utilize its native hardware-backed cryptographically secure pseudo-random number generator (CSPRNG).
3. Copy or Download:
   • Use the 📋 Copy buttons to grab the PEM text directly.
   • Use ⬇ Download to save public_key.pem and private_key.pem onto your local workstation.