| 摘要 |
An embodiment of the present invention provides an information exchange device. The information exchange device includes a storage device which stores information items for disclosure, an encryption device which encrypts each of the information items for disclosure using a plurality of prepared secret keys which correspond to each of the information items for disclosure, a transmitting device which transmits the encrypted information items and the plurality of prepared secret keys, and a decryption device which receives an encrypted information item which is arbitrarily selected from the plurality of encrypted information items, receives a secret key related to the selected encrypted information item from among the plurality of prepared secret keys, and decrypts the selected encrypted information item using the secret key.
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