Patent ID: 7299364
Filing Date: 2007-11-20
Classification: G06F

Abstract:
1. A system to maintain application data stored on a portable computer secure, the system comprising: an authorization client for use on the portable computer for making requests, the portable computer being capable of providing in-memory portions of address space for an application program; a security device to be associated with an authorized user of the portable computer and including an authorization server for supplying responses to the requests; a communication subsystem for wirelessly communicating the requests and the responses to the server and the client, respectively, within a range; and a cryptographic subsystem for encrypting data located in the in-memory portions of the address space to obtain corresponding encrypted data when the security device is outside the range of the communication subsystem and for decrypting the encrypted data when the security device is back within the range; wherein the requests include cryptographic requests for cryptographic information and wherein the server supplies the cryptographic information in response to the cryptographic requests and wherein the cryptographic subsystem utilizes the cryptographic information to either encrypt or decrypt the data.