Activation of Cryptographically Paired Device

Abstract

An event is detected at a first device. Responsive to the detection, at least some functionality of the first device is deactivated. The presence of a second device, cryptographically paired with the first device, is detected by the first device. Responsive to the detection, at least some functionality of the first device is activated or reactivated.

1 . A method comprising:
 detecting an event at a first device;   responsive to the event, deactivating at least some functionality of the first device;   detecting the presence of a second device that is cryptographically paired with the first device using a communication link; and   responsive to detecting the presence of the second device, initiating activation or reactivation of the at least some functionality of the first device.   
   
   
       2 . The method of  claim 1 , where the communication link is a wireless link. 
   
   
       3 . The method of  claim 1 , where the event is power loss or security breach. 
   
   
       4 . The method of  claim 1 , where the first device includes a navigation function and the second device includes a telephony function. 
   
   
       5 . The method of  claim 1 , where the mobile device includes a multi-touch-sensitive display that can respond to finger gestures. 
   
   
       6 . The method of  claim 1 , where detecting the presence of a second device further comprises:
 searching a wireless network for the second device.   
   
   
       7 . The method of  claim 1 , where the first device and the second device are cryptographically paired using Bluetooth pairing technology. 
   
   
       8 . A system comprising:
 a processor; and   a computer-readable medium coupled to the processor and storing instructions, which when executed by the processor, causes the processor to perform operations comprising:   detecting an event at a first device;   responsive to the event, deactivating at least some functionality of the first device;   detecting the presence of a second device that is cryptographically paired with the first device using a communication link; and   responsive to detecting the presence of the second device, initiating activation or reactivation of the at least some functionality of the first device.   
   
   
       9 . The system of  claim 8 , where the communication link is a wireless link. 
   
   
       10 . The system of  claim 8 , where the event is power loss or security breach. 
   
   
       11 . The system of  claim 8 , where the first device is a navigation system and the second device is a mobile device. 
   
   
       12 . The system of  claim 8 , where the mobile device includes a multi-touch-sensitive display that can respond to finger gestures. 
   
   
       13 . The system of  claim 8 , where detecting the presence of a second device further comprises:
 searching a wireless network for the second device.   
   
   
       14 . The system of  claim 8 , where the first device and the second device are cryptographically paired using Bluetooth pairing technology. 
   
   
       15 . A computer-readable medium having instructions stored thereon, which, when executed by a processor, causes the processor to perform operations comprising:
 detecting an event at a first device;   responsive to the event, deactivating at least some functionality of the first device;   detecting the presence of a second device that is cryptographically paired with the first device using a communication link; and   responsive to detecting the presence of the second device, initiating activation or reactivation of the at least some functionality of the first device.   
   
   
       16 . The computer-readable medium of  claim 15 , where the communication link is a wireless link. 
   
   
       17 . The computer-readable medium of  claim 15 , where the event is power loss or security breach. 
   
   
       18 . The computer-readable medium of  claim 15 , where the first device includes a navigation function and the second device includes a telephony function. 
   
   
       19 . A system comprising:
 means for detecting an event at a first device;   responsive to the event, means for deactivating at least some functionality of the first device;   means for detecting the presence of a second device that is cryptographically paired with the first device using a communication link; and   responsive to detecting the presence of the second device, means for initiating activation or reactivation of the at least some functionality of the first device.   
   
   
       20 . An apparatus comprising:
 wireless communications circuitry; and   a processor coupled to the wireless communication circuitry and operable for receiving cryptographic pairing information from a device cryptographically paired with the apparatus, and for activating, deactivating or reactivating features or functionality of the apparatus based on the cryptographic pairing information.   
   
   
       21 . The apparatus of  claim 20 , where the apparatus includes a navigation function. 
   
   
       22 . The apparatus of  claim 20 , where the processor is operable for detecting the presence of the device by searching a wireless network for the device. 
   
   
       23 . The apparatus of  claim 22 , where the cryptographic pairing is Bluetooth pairing.