The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 23, 2004
Filed:
May. 19, 1999
Frank L. Laczko, Sr., Allen, TX (US);
Edward Ferguson, Plano, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A secure computing system prevents unauthorized use of compressed video data stored in a first-in-first-out memory buffer in a set top box. A single integrated circuit includes a data processor and a chip identity read only register storing a unique chip identity number fixed during manufacture. The data processor encrypts the compressed video data stream using the chip identity number as an encryption key. This encrypted data is stored in and recalled from a FIFO buffer. The data processor then decrypts the recalled data employing at least a part of the chip identity number as the decryption key. Using technique the compressed video data stream temporarily stored in compressed form in the FIFO buffer can only be employed by the particular data processor having the unique chip identity number.