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:
Nov. 20, 2018
Filed:
Aug. 25, 2016
Google Inc., Mountain View, CA (US);
Benjamin Charles Serebrin, Mountain View, CA (US);
Timothy Chen, Mountain View, CA (US);
Scott Johnson, Mountain View, CA (US);
Google LLC, Mountain View, CA (US);
Abstract
A method in a memory system having a security device and a serial external electrically erasable read-only memory (EEPROM) is disclosed. The method includes accepting N bits of a command prefix and matching the bits to command filtering rules. Upon matching the prefix to a command filtering rule, the method may perform a filter action associated with the matched rule. When the command prefix is for a destructive command prefix that can modify data in the EEPROM, the filter action may convert the command into a non-destructive command and inspect it for authentication. The converted command may be output to the external EEPROM without security processing in the security device and the external EEPROM may return read data without outputting. When the command prefix is for a non-destructive command prefix, the command may be allowed to pass through the external EEPROM unchanged without performing security processing in the security device.