Patent ID: 7979556
Filing Date: 2011-07-12
Classification: G06F,H04L,H04W

Abstract:
1. A method of providing security for portable computerized devices, comprising: providing a first, substantially portable computerized device; placing a second, substantially portable computerized device in data communication with said first device via an ad hoc communications link; running a first computer program on said first computerized device to obtain at least one temporary address for said first computerized device; running a second computer program on said first computerized device to establish a non-permanent security association between said first and second devices, said second computer program comprising a cryptographic data exchange algorithm adapted to cause said first computerized device and said second device to exchange cryptographic data, said data being substantially unique to said security association; and running a third computer program on said first computerized device to seal or encrypt data sent from said first device using at least one cryptographic key, said sealed or encrypted data also being integrity protected for the purpose of verifying that data sent from said first device has not been modified en route; wherein said first device comprises an untrusted operating system, and is physically non-secure; and wherein said second device comprises an untrusted operating system, and is physically non-secure.