Public-Key Tool: Generate Keys & Decrypt

Generate a public/private key pair. Share your public key with others so they can send you encrypted messages. To decrypt a received message, paste the ciphertext below and press Decrypt. You may also want to try the public-key encryption tool or the symmetric-key encryption tool.

Your Public Key (safe to share):

Your Private Key (do NOT share):

Ciphertext (the encrypted message you received):

Plaintext (decrypted message):

About this tool: This uses 1024-bit RSA (public/private-key) encryption. Public-key encryption is useful because the sender and recipient don't need a shared secret — only the public key needs to be shared. The trade-off is that it's slower than symmetric-key encryption.

Disclaimer: This is an educational demo and should not be used for truly sensitive messages. For real security, use Signal.

Credits: This tool uses the cryptico project.