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:
Feb. 04, 2014
Filed:
Sep. 14, 2009
Love Kothari, Sunnyvale, CA (US);
Paul Chou, Santa Clara, CA (US);
John Markey, San Diego, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A semiconductor chip may be operable to block the debug interfaces when the semiconductor chip boots up from the boot read-only memory (ROM). The semiconductor chip may be operable to authenticate a debug certificate received by the semiconductor chip and enable one or more debug interfaces in the semiconductor chip based on the information resulting from the authentication of the debug certificate. The debug certificate may be in a form of a cryptographic public key certificate. A unique device ID which may be generated at boot and stored in the memory may be used by the semiconductor chip to authenticate the debug certificate. The device ID may be generated using the cryptographic public key that is stored in the one-time programmable (OTP) memory in the semiconductor chip and a cryptographic hash algorithm.