Live television broadcast and other information and enter tainment programs, eg, videos-on-
demand (VOD), are pro vided to a user through a communications network, eg, a cable …

An encryption arrangement for multiple encryption of tele vision programs. A system
according to embodiments of the present invention multiple encrypts only a portion of the …

12 produce second encrypted segments. A set of pointers are generated that point to the first
and second encrypted seg ments content. A file is then created containing first and second …

(57) ABSTRACT A selective encryption method and apparatus consistent With the invention
duplicates selected packets in a? le or data stream and multiple encrypts the packets using …

The invention is premised upon the recognition that although use of the prior art BFS server
carousel is effective in providing selection links to on-demand programs, it some times …

According to one embodiment, a method for scrambling and descrambling program data
comprises the receipt of a mating key generator message including a manufacturer …

An encryption arrangement for multiple encryption of tele vision programs. A system
according to embodiments of the present invention multiple encrypts only a portion of the …

(57) ABSTRACT A method of generating a program signal stream comprises creating a
sequence of serial programs that include a first event and a second, later occurring event …

(60) Provisional application No. 60/343,710, filed on Oct. 26, 2001, provisional application
No. 60/304.241,(57) ABSTRACT filed on Jul. 10, 2001, provisional application No …

5,091,936 A 2/1992 Katznelson et a1............ 380/19 5,742,681 A 21/1998 Giachettiet a1,
____________ __ 3g0/20 5,122,873 A 6/1992 Golin 5,751,280 A 5/1998 …