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Data processing unit for an electronic purse, manages data exchange and maintains local and central balance data
Data processing unit for an electronic purse, manages data exchange and maintains local and central balance data
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机译:电子钱包的数据处理单元,管理数据交换并维护本地和中央余额数据
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摘要
The data processing unit has a terminal (3) to manage data exchange with communication devices (4) which can access remote balances. The communication device has a local memory holding the local balance. The processing unit also handles transactions, sending purchaser data to a vendor communication device, modifying the local balance during the transaction.
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