General Instrument Corporation

Joseph F Halgas, Jr

Christopher Stone

Raymond C Bontempi

A set top box is provided that includes a receiver/tuner for receiving programming content over a broadband communications network, a secure memory configured to store at least a first cryptography key to be used to encrypt and decrypt the programming content, and a digital storage medium for storing encrypted programming content. The set top box also includes a multimedia processor operationally associated with the receiver/tuner, the secure memory, and the digital storage medium. The multimedia processor is configured to: encrypt programming content using the first cryptography key stored in the secure memory and uniquely associated with the set top box; store the encrypted content on the digital storage medium; encrypt the first cryptography key using an asymmetric public encryption key to form an encrypted first cryptography key; and store the encrypted first cryptography key on the digital storage medium.

Method and apparatus for storing and retrieving encrypted programming content using an asymmetric key arrangement

A set top box is provided that includes a receiver/tuner for receiving programming content over a broadband communications network, an encrypter/decrypter for encrypting and decrypting the programming content, and a secure memory configured to store at least a first cryptography key to be used by the encrypter/decrypter to encrypt and decrypt the programming content. The set top box also includes a digital storage medium for storing encrypted programming content, a multimedia processor operationally associated with the receiver/tuner, the decrypter, and the digital storage medium, and a user interface operationally associated with the multimedia processor. The multimedia processor is configured to: encrypt decoded programming content using the first cryptography key stored in the secure memory and uniquely associated with the set top box; store the encrypted content on the digital storage medium; encrypt the first cryptography key using a second cryptography key to form an encrypted first cryptography key; and store the encrypted first cryptography key on the digital storage medium.

Method and apparatus for storing and retrieving encrypted programming content such that it is accessible to authorized users from multiple set top boxes

A technique is described that allows a viewer to eliminate a fixed information band portion of a television image (e.g., a scrolling news 'crawl' or fixed advertising band) from a television display by 'stretching' the main program portion to fill the screen, effectively pushing the undesired crawl or advertising band off of the display. This eliminates a feature of many television broadcasts that many viewers find distracting and/or annoying, and helps to prevent phosphor burn on phosphor-based display screens.

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Huntingdon Valley, PA, United States of America

Joseph F Halgas, Jr