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AssigneeQUALCOMM Incorporated
InventorsOlivier Jean Benoit, David Tamagno
Estimating the term…
Various features pertain to defending a smartphone processor or other device from a transient fault attack. In one example, the processor is equipped to detect transient faults using a fault detection system and to adaptively adjust a control parameter in response to the transient faults, where the control parameter controls a physical operation of the processor (such as by gating its clock signal) or a functional operation of the fault detection system (such as a particular Software Fault Sensor (SFS) employed to detect transient faults). In some examples, in response to each newly detected fault, the detection system is controlled to consume more processor time to become more aggressive in detecting additional faults. This serves to quickly escalate fault detection in response to an on-going attack to promptly detect the attack so that the device can be disabled to prevent loss of sensitive information, such as security keys or passcodes.
A method operational on a processor device, comprising:
A processor device, comprising:
The processor device of claim 19, wherein the percentage of time devoted by the processor device to defensive countermeasures is increased only if a number of new transient faults detected within the tracking interval exceeds a lower threshold.
The processor device of claim 19, wherein the percentage of time devoted by the processor device to defensive countermeasures is increased during the tracking interval in proportion to a number of new transient faults detected within the tracking interval.
A processor device, comprising:
A machine-readable storage medium having one or more instructions which when executed by a processing circuit causes the processing circuit to:
A method operational on a processor device, comprising:
A processor device, comprising:
A processor device, comprising:
A machine-readable storage medium having one or more instructions which when executed by a processing circuit causes the processing circuit to:
Dependencies are inferred from the claim text.