Nds Corporation

Gershon Bar-On

Yossef Tsuria

Shabtai Atlow

Moshe Kranc

Yishai Sered

Jonathan Maissel

David Zviel

Amir Eilat

This invention discloses a secure recording medium having at least one of audio, video and software content, comprising a plurality of media recording disks (DVD's) with a disk security chip embedded in each the DVD, each the disk chip comprising a security key, wherein at least two of the DVD's have different disk security keys. A method for protecting access to content recorded on a media recording disk (DVD) is also disclosed.

Protection of data on media recording disks

A subscriber unit for use in a television system including a television network and transmitting apparatus for transmitting program schedule information, the subscriber unit including a receiving unit for receiving the program schedule information, a profile storage unit for storing at least one viewer preference profile of at least one television viewer, an intelligent agent for customizing the program schedule information based, at least in part, on the viewer preference profile, to produce a program guide including customized program schedule information, and display apparatus for displaying the program guide.

Intelligent electronic program guide

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Kochav Hashachar, Israel

Gershon Bar-On