This Recommendation provides MAC layer privacy (encryption and authentication) services for
DOCSIS CMTS-CM communications. This Recommendation, often referred to as Baseline Privacy
Interface Plus or BPI+, has the following two goals:
? provide cable modem users with data privacy across the cable network; and
? provide cable operators with service protection; i.e., prevent unauthorized users from
gaining access to the network's RF MAC services.
BPI+ provides a level of data privacy across the shared medium cable network equal to or better
than that provided by dedicated line network access services (analog modems or digital subscriber
lines).