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• The Digital Signature Side Effect

• Using Asymmetrical (Public Key) Encryption has an interesting side effect -- it allows the recipient to verify or Authenticate that the message was sent from the correct sender

• Private Decryption Key

• Public
• Encryption Key

• Private Decryption Key

• Public
• Encryption Key

• In order for us to have 2-way communications with someone we would have 4 keys that allow the communications loop shown here