Summary

Public key cryptography

  • public key is non-secret
  • encryption only requires the public key
  • decryption requires a private key
  • only a secure broadcast channel is needed, instead of many individual channels for symmetric-key encryption

Concept

Asymmetric-key encryption

PlaintextmEncryptionE(ke;m)=cCiphertextcDecryptionD(hke;kdi;c)=mPlaintextmPublicKeykePrivateKeykd

Application

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