Patent ID: 7831722

Claim:
A portable communications device, comprising: a host computerized device having an operating system; a network communications interface adapted to communicate with a network and said host computerized device; a security card adapted to be received at least partly within said host computerized device, said security card having portions comprising user-specific and cryptographic data stored therein, at least said portions being protected against access by unauthorized users; a first computer program adapted to dynamically obtain at least one identifier for said portable communications device when said communications interface is placed in data communication with said network; a second computer program adapted to establish security association between said portable communications device and a security device on said network, said second computer program comprising a key exchange algorithm adapted to cause said portable communications device and said security device to exchange cryptographic keys while establishing said association; and a third computer program adapted to seal or encrypt data sent from said portable communications device using at least one of said cryptographic keys; wherein said key exchange algorithm includes the generation and transmission of a random number by only one party to the security association.