Public Key Encryption (PKE)

• Asymmetric (“Public-key Encryptoin”)

  • Eg: RSA, Diffie-Hellman
  • Public key; Private key
  • Data -> Public key -> private key -> Data
  • Use receiver’s public key to encrypt and send data to receiver (“body”)
  • Authentication => verify ownership of private key. Encrypt message with sender’s private key (“signature”)
  • Problems:
    • Extremely CPU intensive, and slow
    • Need to secure private keys

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