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:
Apr. 10, 2007
Filed:
Jul. 09, 2001
Liat Ben-zur, San Diego, CA (US);
Curtis D. Mursfeldt, San Diego, CA (US);
Christopher Wingert, San Diego, CA (US);
Paul Pomes, Urbana, IL (US);
Jesse Hose, Carlsbad, CA (US);
Ann C. Irvine, Bonsall, CA (US);
Senthil Govindaswamy, San Diego, CA (US);
Liat Ben-Zur, San Diego, CA (US);
Curtis D. Mursfeldt, San Diego, CA (US);
Christopher Wingert, San Diego, CA (US);
Paul Pomes, Urbana, IL (US);
Jesse Hose, Carlsbad, CA (US);
Ann C. Irvine, Bonsall, CA (US);
Senthil Govindaswamy, San Diego, CA (US);
Qualcomm, Inc., San Diego, CA (US);
Abstract
An apparatus for installing a decryption key is initially arranged so that a decryption algorithm received by a control processor is passed via a first interface path to a decryption processor. The algorithm is installed in the decryption processor together with a program decryption key. The apparatus is subsequently arranged so that encrypted working decryption keys received by the control processor are passed on to the decryption processor over the first interface path. The decryption processor decrypts the encrypted keys using the program decryption key. Decryption keys are thus obtained and are transferred via a second interface path to decryptors for use in decrypting encrypted program signals input to the decryptors.