Patent ID: 6854062
Filing Date: 2005-02-08
Classification: G06F,H04L

Abstract:
1. A communication method in a household system, the household system comprised by an electronic device which reads data from a bridging medium and a security-judging device which performs firewall processing on the data in order to make a judgment as to the security of the data, the electronic device independent from any network to communicate with the security-judging device, comprising the steps of: reading, at the electronic device, data from the bridging medium; at the electronic device, checking for an electronic signature created by a reliable data provider attached to the data; at the electronic device, using the data if the data has the electronic signature created by the reliable data provider; at the electronic device, checking for an electronic signature created by the security-judging device attached to the data; at the electronic device, using the data if the data has electronic signature created by the security-judging device; displaying, at the electronic device, a message to a user to have the security-judging device read the data in the bridging medium when neither the electronic signature created by a reliable data provider nor the electronic signature created by the security-judging device is attached to the data; reading, at the security-judging device, the data from the bridging medium; performing, at the security-judging device, firewall processing on the data to make a judgment as to the security of the data; displaying, at the security-judging device, a message to the user indicating that the data cannot be used when the judgment result indicates that the data are not secure; creating, at the security-judging device, an electronic signature for the data to attach to the data in the bridging medium when the judgment result indicates that the data are secure; and displaying, at the security-judging device, a message to the user to have the electronic device using bridging medium read the secure data from the bridging medium.