junkurihara/cascade

graph TB;
  SK-->|Message Input|PKE[Public Key Encryption];
  PK["Public Key(s)"]-->|Key Input|PKE;

  subgraph step 2
    PKE-->|Output|CTSK("Ciphertext(s) of Session Key");
  end

  M[Plaintext Message]-->|Message Input|SKE[Symmetric Key Encryption];
  SK[Session Key]-->|Key Input|SKE;

  subgraph step 1
    SKE-->|Output| CTM(Ciphertext of Message);
  end