To accurately transmit an electronic message, the sender needs to know one code and thereceiver needs to kn?

Answer 1

To accurately ask a question you need to READ it first before posting, so you see if you actually asked it.

Sounds very much like a quoted question from homework, so check course notes for answer

Answer 2

The question your are asking is very obscure, inspite of the shown fact that it looks like public key cryptography. once you deliver the message you encrypt it using the the recipient's public key. while the message is won the recipient makes use of his inner maximum to decrypt the message.