| 摘要 |
PROBLEM TO BE SOLVED: To provide a method requiring no practical modification in a user device to exchange information among persons concerned of an electronic commercial transaction, the user device and an electronic system. SOLUTION: This method to exchange transaction information comprises a process to produce a data entity based on an electronic data card format, a process to include information relating to the transaction in the data entity, and a process to carry the data entity between a user device and the person concerned of the transaction through a means of communication. |
