Uses Of Public Key Encyption

• Data encrypted with the public key can only be decrypted with the private key.
  • Use public key encryption for privacy.
  • Encrypt the data using the recipient's public key.
    • The public key is freely distributed.
  • Data can only be decrypted by the recipient's private key.
    • The private key is kept secret.

• Data encrypted with the private key can only be decrypted with the public key.
  • Use public key encryption for authentication.
  • Encrypt the data using the sender's private key.
    • The private key is kept secret.
  • Data can only be decrypted by the sender's private key.
    • The public key is freely distributed.

What is a digital signature?

---

---

© 2006 John Michael Pierobon

Notes