Using Public Key Encryption

• Public key encryption can be used in two ways.
  • A message can be encrypted with the public key.
    • Anyone with the public key can encrypt a message.
    • Only the owner of the private key can read the message.
  • A message can be encrypted with the private key.
    • Anyone with the public key can decrypt the message.
    • Anyone with a genuine copy of the public key can be sure the message is genuine.

What is a digital signature?

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© 2006 John Michael Pierobon

Notes