Reliability for location services

摘要

A system for determining reliability for location resources. A device may be configured to determine device location based on location information received from a location information source, the device including secure systems configured to provide a reliability rating of the location information source. The secure systems may be configured to compare a device location based on the location information to a secondary device location based on secondary information to determine the reliability rating. For example, location information based on location signals received by the device may be compared to sensor information in the device to determine whether the movement described by location information and sensor information agrees. In the same or a different embodiment, a refined reliability rating may be requested from a secure resource in the device or accessible via a network. The secure resource may refine the reliability rating using tertiary information available to the secure resource.

主权项

1. A system, comprising:
a location information source including a transmitter to transmit at least one global positioning (GPS) signal including location information; and a device including a host including processor circuitry to control operation of the device, a receiver to receive said at least one GPS signal from said location information source, and secure operating core circuitry to: determine, independently of said host, a device location based on said location information; determine an expected signal strength for said least one GPS signal at least in part by comparing the signal strength of the at least one GPS signal to at least one of device orientation, device motion or device acceleration sensed over a period of time; compare said expected signal strength to a signal strength of said at least one GPS signal; and determine, independently of said host, a reliability rating based on said comparison, wherein said reliability rating is indicative of a trustworthiness of said location information source.