| 摘要 |
A simple, general-purpose electronic commerce system through on-line communication using a credit card without risks of doing a deal with a bogus merchandise dealer, ensuring safe business dealings. When a card holder purchases an article from a merchandise dealer, the card holder terminal (1) enciphers partial data relating to parties including the merchandise dealer, the card manager, and the distribution dealer of the order data, using a common encryption key effective only between the parties and then transmits the enciphered data to the terminals (3 and 4) via the terminal (2) of the merchandise dealer. Each party does its desired business dealing by deciphering the partial data related to itself, using the encryption key in common with that of the card holder.
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