Method and apparatus for managing electronic money and storage for storing an electronic money management program

An electronic money managing device for mediating electronic money transactions employing an electronic money digital cash system between a terminal connected to a LAN and a terminal connected to a WAN, said WAN on which wide electronic money flows, and said LAN on which local electronic money usable only within an organization in which said LAN is operable and having a same currency as said wide electronic money flows, said managing device comprising:

• a first means for receiving from said LAN said local electronic money encrypted by an encryption key of said network device whose destination terminal is a terminal connected to said WAN, decrypting said local electronic money by a decryption key of said network device to confirm the amount of said local electronic money, requesting issuance of said wide electronic money in the same amount as said local electronic money thus received to an issue server connected to said WAN, and upon receipt of said wide electronic money encrypted by said encryption key of said network device from said issue server, decrypting said wide electronic money by said decryption key of said network device to confirm the amount of said wide electronic money, erasing said local electronic money thus received, and encrypting said wide electronic money by an encryption key of said destination terminal of said local electronic money thus received to transmit said wide electronic money thus encrypted to said destination terminal of said local electronic money thus received through said WAN;
• and
• a second means for receiving from said WAN said wide electronic money encrypted by said encryption key of said network device whose destination terminal is a terminal connected to said LAN, decrypting said wide electronic money by said decryption key of said network device to confirm the amount of said wide electronic money, encrypting said wide electronic money thus decrypted by an encryption key of a receiving server connected to said WAN, transmitting said wide electronic money thus encrypted to said receiving server, and upon receipt of acknowledge from said receiving server as to receipt of said wide electronic money, generating said local electronic money in the same amount as said wide electronic money, and encrypting said local electronic money by an encryption key of said destination terminal of said wide electronic money thus received to transmit said local electronic money thus encrypted to said destination terminal of said wide electronic money thus received through said LAN.

An information recording medium storing therein an electronic money managing program for mediating electronic money transactions employing an electronic money digital cash system between a terminal connected to a LAN and a terminal connected to a WAN, said WAN on which wide electronic money flows, and said LAN on which local electronic money usable only within an organization in which said LAN is operable and having the same currency as said wide electronic money flows, said electronic money managing program implementing the following means in an information processing device connected to said LAN and said WAN:

• a first means for receiving from said LAN said local electronic money encrypted by an encryption key of said network device whose destination terminal is a terminal connected to said WAN, decrypting said local electronic money by a decryption key of said network device to confirm the amount of said local electronic money, requesting issuance of said wide electronic money in the same amount as said local electronic money thus received to an issue server connected to said WAN, and upon receipt of said wide electronic money encrypted by said encryption key of said network device from said issue server, decrypting said wide electronic money by said decryption key of said network device to confirm the amount of said wide electronic money, erasing said local electronic money thus received, and encrypting said wide electronic money by an encryption key of said destination terminal of said local electronic money thus received to transmit said wide electronic money thus encrypted to said destination terminal of said local electronic money thus received through said WAN;
• and
• a second means for receiving from said WAN said wide electronic money encrypted by said encryption key of said network device whose destination terminal is a terminal connected to said LAN, decrypting said wide electronic money by said decryption key of said network device to confirm the amount of said wide electronic money, encrypting said wide electronic money thus decrypted by an encryption key of a receiving server connected to said WAN, transmitting said wide electronic money thus encrypted to said receiving server, and upon receipt of acknowledge from said receiving server as to receipt of said wide electronic money, generating said local electronic money in the same amount as said wide electronic money, and encrypting said local electronic money by an encryption key of said destination terminal of said wide electronic money thus received to transmit said local electronic money thus encrypted to said destination terminal of said wide electronic money thus received through said LAN.