ELECTRONIC VALUE SYSTEM

摘要

An efficient tracking of amount of money in an electronic money information system is implemented. A moving machine, which is typically a portable phone mounted thereon with a UIM (User Identity Module) carrying electronic values, transfers values with an electronic bank server, other moving machines and apparatuses incorporating moving machines. The electronic bank server keeps track of a value deposited in an electronic value account and a value balance downloaded to the UIM, and updates these values on receiving a signed log for value transferred transactions. The log is transmitted periodically or as needed by one or both of the moving machines at transaction-related parties.