Mobile device security

A mobile device comprising:

• one or more processors;
• a wireless network interface operatively associated with the one or more processors;
• a memory operatively associated with the one or more processors and comprising:
• a security module configured to:
• create a geolocation signature of the mobile device over time by storing a series of geolocations with a series of time points;
• compare a current geolocation of the mobile device at a particular time with a geolocation for the particular time stored in the geolocation signature to determine if the current geolocation varies from the geolocation for the particular time stored in the geolocation signature by more than a threshold amount;
• and
• initiate a security event in response to the current geolocation varying from the geolocation for the particular time stored in the geolocation signature by more than the threshold amount.

One or more non-transitory computer-readable storage media storing computer-executable instructions that, when executed by one or more processors, instruct a mobile device to perform acts comprising:

• storing a series of geolocations in association with a series of time points to create a geolocation signature for the mobile device;
• comparing a current geolocation of the mobile device at a particular time with a geolocation for the particular time stored in the geolocation signature to determine if the current geolocation varies from the geolocation for the particular time stored in the geolocation signature by more than a threshold amount;
• and
• initiating a security event in response to the current geolocation varying from the geolocation for the particular time stored in the geolocation signature by more than the threshold amount.