Multiple Home Terminal Units: Subscriber Convenience -- Security Risk (1985)

By James R. Cherry and Tony Chen-tung Li, Oak Communications Inc.

The need of the subscriber to simultaneously operate multiple TV sets and/or VCR's from his cable service has led to significant use of multiple home terminal units (HTU). If a subscriber pays a lower fee for a secondary HTU that is authorized to receive the same premium service as his primary unit a risk exists that the unit will be sublet to a neighbor. For addressable cable systems using out-of-band data carriers, a master/slave configuration is proposed as a solution to the problem of subletting secondary units. The master/slave consists of two HTU's: the master used with the primary set and the slave used with the secondary sets. The slave unit does not function unless its address-control channel is protected by a master HTU. Thus, if the slave unit is used in a neighbor's home without its master, the secondary, or slave, unit will not function. Both master and slave HTU's can still respond with all addressable features. The uniqueness of the scheme lies in the selective blocking, by the master unit, of deauthorize commands directed at all slave HTU's. A high level of security is maintained without the requirement for complex, handshaking duplex data communications between the two HTU's.

By clicking the "Download Paper" button, you are agreeing to our terms and conditions.

Similar Papers

Multiple Home Terminal Units: Subscriber Convenience -- Security Risk
By James R. Cherry and Tony Chen-tung Li, Oak Communications Inc.
A User's Guide To Home Terminal Units
By Delbert H. Heller, Viacom Cablevision
Security Of Equipment And Services - The Terminal Manufacturers Role
By Graham S. Stubbs, OAK Industries Inc.
Hybrid Addressability -- A Hybrid Combination Of Off-Premises And Set-top Addressable Equipment
By Graham S. Stubbs, Oak Communications Inc. & John Holobinko, Times Fiber Communications, Inc.
Encryption-Based Security Systems What Makes Them Different And How Well Are They Working?
By Anthony J. Wechselberger Vice President, Engineering , OAK Communications Inc.
Security Alert A Two-way Digital Communications System
By Marvin Roth, Senior Engineer, Scientific-Atlanta, Inc.
E-Commerce Over Cable: Providing Security For Interactive Applications
By Tony Wasilewski, Scientific-Atlanta, Inc.
Subscriber Terminal Interface Requirements
By T. P. Ellsworth,The Magnavox company
MTS Compatibility In Encrypted Baseband Scrambling Systems
By James R. Holzgrafe, Senior Staff Scientist, Arthur E. Vigil, Staff Scientist, Oak Communications Inc.
Optimal Availability & Security For Voice Over Cable Networks
By Chun K. Chan, Andrew R. McGee, Martin J. Glapa, and Uma Chandrashekhar, Bell Laboratories, Lucent Technologies
More Results >>