Patent ID: 7343619

Claim:
A method of providing controlled communication, the method comprising: processing of data within a first computing system in accordance with a first defined logic; generating a first security tag independent of the first data packets, responsive to validating the processing, within the first computing system, occurring in accordance with a second defined logic; wherein the generating of the first security tag is unrelated to content of the first data packet, transmitting the first security tag as an output from the first computing system onto a communications path in accordance with the defined rules of transmission for coupling to a second computing subsystem; transmitting a first data packet, after the transmitting of the first security tag, as an output from the first computing system onto a communications path in accordance with defined rules of transmission; validating the first security tag responsive to independent generation in the second computing system therein of a second security tag; and controlling communications with the first computing system responsive to the validating the first security tag responsive to the generation of the second security tag.