Patent ID: 7917631
Filing Date: 2011-03-29
Classification: G06F,H04L,H04W

Abstract:
1. A security system adapted to permit ad hoc and temporary security associations to exist between portable computerized devices that may or may not have communicated previously, comprising: a first, substantially portable computerized device having a first communications and security card received substantially therein; a second, substantially portable computerized device having a second communications and security card received substantially therein; first computer programs operative to run on respective ones of said first and second computerized devices to establish a temporary ad hoc security association between said first and second devices, said first computer programs each comprising a key exchange algorithm that causes said first and second devices to exchange respective cryptographic keys over a physically non-secure network and generated substantially under control of respective ones of said cards while establishing said association, said keys being substantially unique to said association; second computer programs operative to run on respective ones of said first and second devices and adapted to encrypt data sent to the other device using at least one of said cryptographic keys; and third computer programs operative to run on respective ones of said first and second devices and each adapted to evaluate said encrypted data sent from the other device for at least data integrity using cryptographic residues generated by both of said devices.