DATA SCRAMBLING SYSTEM FOR A SHARED TRANSMISSION MEDIA

Methods of providing added security for communications between a server and a particular client modem on a shared communication media. The methods provide for passing communications containing scrambled keys to be used to form scrambling seeds for scrambling subsequent messages. In a preferred embodiment, both the server and the client modem generate and pass keys to be used for the communications between the server and that client modem to achieve a dynamic dual key scrambling system.