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    • 1. 发明申请
    • SUPPLY SYSTEM
    • 供应系统
    • WO2002073553A1
    • 2002-09-19
    • PCT/GB2001/001135
    • 2001-03-14
    • PRI LIMITEDFIELDEN, JohnSINGHAL, SanjayaJAMES, Andrew
    • FIELDEN, JohnSINGHAL, SanjayaJAMES, Andrew
    • G07F15/00
    • G06Q20/127G06Q20/28G07F15/003G07F15/12G07F17/0014
    • A system for supplying pre-paid goods or services eg electricity to a user, comprising: a monitoring device locate at the user's premises for monitoring usage of goods or services, the device including a storage means for storing a signal indicative of the current amount of credit, a keyboard for entering an encoded message in the form of a data encryption standard code which includes information indicative of an amount of credit, decryption means for decrypting the encoded message, and processing means for processing the decoded message in order to determine the amount of credit and for updating the storage means; and a message generating device located remote from the user's premises for generating an encoded message in the form of a data encryption standard code in a discernable alpha-numeric format, the encoded message generating device and the decryption means utilising the same key, which key is changed for every transaction.
    • 一种用于向用户提供预付货物或服务(例如电力)的系统,包括:监视设备,位于用户的房屋处,用于监视商品或服务的使用,该设备包括存储装置,用于存储指示当前量的 信用卡,用于以数据加密标准代码形式输入编码消息的键盘,该数据加密标准代码包括指示信用量的信息,用于解密编码消息的解密装置,以及用于处理解码消息的处理装置,以便确定数量 的信用和更新存储手段; 以及位于远离用户场所的消息产生设备,用于以可辨别的字母数字格式生成以数据加密标准代码形式的编码消息,编码消息生成设备和使用相同密钥的解密装置,该密钥是 改变了每一笔交易。