Systems and Methods for Provisioning and Using Multiple Trusted Security Zones on an Electronic Device
First Claim
1. A method of provisioning a subordinate trusted security zone in a processor having a trusted security zone, comprising:
- receiving, by a master trusted application executing in a master trusted security zone of the processor, a request to provision a subordinate trusted security zone in the processor, wherein the request comprises a master trusted security zone key, wherein the request designates the subordinate trusted security zone, and wherein the request defines an independent key; and
provisioning, by the master trusted application, the subordinate trusted security zone to be accessible based on the independent key.
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Accused Products
Abstract
A method of provisioning a subordinate trusted security zone in a processor having a trusted security zone. The method comprises receiving by a master trusted application executing in a master trusted security zone of the processor a request to provision a subordinate trusted security zone in the processor, wherein the request comprises a master trusted security zone key, wherein the request designates the subordinate trusted security zone, and wherein the request defines an independent key. The method further comprises provisioning by the master trusted application the subordinate trusted security zone to be accessible based on the independent key.
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Citations
20 Claims
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1. A method of provisioning a subordinate trusted security zone in a processor having a trusted security zone, comprising:
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receiving, by a master trusted application executing in a master trusted security zone of the processor, a request to provision a subordinate trusted security zone in the processor, wherein the request comprises a master trusted security zone key, wherein the request designates the subordinate trusted security zone, and wherein the request defines an independent key; and provisioning, by the master trusted application, the subordinate trusted security zone to be accessible based on the independent key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 15, 16, 17, 18, 19, 20)
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8. A method of changing the memory size of a subordinate trusted security zone in a processor having a trusted security zone, comprising:
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transmitting an indication of memory utilized by a first subordinate trusted security zone of the processor to a master trusted application executing in a master trusted security zone of the processor; receiving, by the master trusted application, a request to increase the memory size of a second subordinate trusted security zone of the processor; reducing the memory size of the first subordinate trusted security zone based at least in part on the indication of memory utilized by the first subordinate trusted security zone; and increasing the memory size of the second subordinate trusted security zone. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification