Question

why is it important to exchange key out of band in symmetric encryption​

Answer 1

Answer:

An out-of-band channel is a channel of communication that does not carry the ciphertext. Key exchange must either be done out of band or using a secured method so that the key is not intercepted and used to read the secret message

Answer 2

Answer:

An out-of-band channel is a channel of communication that does not carry the ciphertext. Key exchange must either be done out of band or using a secured method so that the key is not intercepted and used to read the secret message.