This is a good explanation but thought it might additionally be useful to link to https://en.m.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exchange https://en

This is a good explanation but thought it might additionally be useful to link to https://en.m.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exchange https://en.m.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_e... as an example of creating a secure channel from an insecure one