COOPERATION DEVICE, COOPERATION SOURCE DEVICE, COOPERATION DESTINATION DEVICE, COOPERATION PROGRAM AND COOPERATION METHOD

摘要

PROBLEM TO BE SOLVED: To improve safety of a cooperation retrieval.SOLUTION: This invention comprises following steps; (1) designating a user's first real ID "aaa" and calculating a hash value "98c%df"; (2) sending an acquisition request of a hash value of a cooperation destination device 102; (3) retrieving a first cooperation table TcA including the hash value "98c%df" and identifying a cooperation ID; (4) retrieving a second cooperation table TcB having the cooperation ID and retrieving a hash value "As8&+)"; (5) sending the retrieved hash value "As8&+)" to a cooperation source device 101; (6) sending an attribute request after receiving the hash value "As8&+)"; (7) extracting the hash value "As8&+)" from the attribute request, identifying a real ID "bbb" from a reverse table Tr and extracting an annual income 123 (ten thousand Japanese yen) from an annual income item in a record of the second real ID "bbb" in an attribute table TaB; and (8) sending the extracted attribute information (the annual income of 123 ten thousand yen).