| 摘要 |
PROBLEM TO BE SOLVED: To provide a place of information exchange allowing persons providing the information with the same keyword to know the presence of the information without teaching the presence of the information, so that the information registered with the same keyword can be mutually effectively used. SOLUTION: In this information exchange device 1, it is retrieved whether the keyword of the information provided from an information owner who newly registers information is matched to the keyword of the information already registered in a database 1B or not. When the provided keyword is matched to the registered keyword as the result of retrieval, the presence of a person possessing the same or approximate information is reported to both the information owners.
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