Patent ID: 8060716
Filing Date: 2011-11-15
Classification: G06F

Abstract:
1. An information processing device that performs operations by switching between a first processing relating to information that needs to be protected and a second processing that is different than the first processing, the information processing device comprising: a secure memory operable to store therein the information that needs to be protected; a plurality of processors, each of the plurality of processors being operable to operate in accordance with a program; a bus that connects the plurality of processors with each other; and a control unit operable to, (i) during a first period for performing the first processing, permit at least one of the plurality of processors to access the secure memory via the bus, and perform one of (a) stopping operations of the others of the plurality of processors and (b) prohibiting the others of the plurality of processors from accessing the secure memory via the bus, and (ii) during a second period for performing the second processing, prohibit all of the plurality of processors from accessing the secure memory via the bus, wherein the control unit includes: wherein the access control subunit stops the operations of the others of the plurality of processors by continually outputting reset signals to the others of the plurality of processors, and wherein the information processing device further comprises