Patent ID: 7139836

Claim:
An apparatus comprising: a sender including a first controller configured to receive a data item including a transmit data portion and a retain data portion; a first tag generator configured to generate a first tag and associate the first tag with the retain data portion; a first transmitter configured to send the transmit data portion, but not the first tag, to a target; wherein the target includes a first receiver configured to receive the transmit data portion sent by the sender; a second controller configured to identify return data corresponding to the transmit data portion; a second tag generator configured to independently generate a second tag and associate the second tag with the return data; a second transmitter configured to send the return data and the second tag to the sender; wherein the sender includes a second receiver configured to receive the return data and the second tag; and wherein the first controller is configured to identify the retain data portion using the second tag and associate the return data with the retain data portion to create a reverse item.