Complex sentence: A CryptoAuth session between two given nodes is set up with a two packet handshake, each of these two packets contains the permanent and temporary keys of the sending node which are piggybacked on top of normal data packets.
Split into simpler sentences: A CryptoAuth session between two given nodes is set up with a two-packet handshake. Each of the two packets contains the permanent and temporary keys of the sending node which are piggybacked on top of normal data packets.