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    • 2. 发明授权
    • Method and system for securing communications in a metering device
    • 用于确保计量装置中通信的方法和系统
    • US08208633B2
    • 2012-06-26
    • US12276523
    • 2008-11-24
    • Robert A. CorderyFrederick W. Ryan, Jr.Yassir Nawaz
    • Robert A. CorderyFrederick W. Ryan, Jr.Yassir Nawaz
    • H04L9/00
    • G06F21/608G06F21/606H04L9/0662H04L9/0869H04L9/3242
    • A method and system for securing the communication link between the accounting device and printer of a metering system by authenticating the data being sent via the link utilizing a Nonlinear Feedback Shift Register (NLFSR) based system is provided. A NLFSR is provided in each of the accounting unit and printing unit of a metering system. The NLFSR in the accounting unit is utilized to generate a message authentication code (MAC) for the image data being sent from the accounting unit to the printing unit. The printing unit generates a corresponding MAC for the received image data using the NLFSR in the printing unit. The MAC generated by the printing unit is compared with the MAC generated by the accounting unit. If the MACs are similar, the image data is accepted as authentic and the printing unit will print the image corresponding to the image data.
    • 提供了一种用于通过基于非线性反馈移位寄存器(NLFSR)的系统认证通过链路发送的数据来确保计费系统的计费装置和打印机之间的通信链路的方法和系统。 在计量系统的每个计帐单元和打印单元中都提供一个NLFSR。 会计单元中的NLFSR用于生成从计费单元发送到打印单元的图像数据的消息认证码(MAC)。 打印单元使用打印单元中的NLFSR为接收的图像数据生成相应的MAC。 由打印单元生成的MAC与由计帐单元生成的MAC进行比较。 如果MAC相似,则图像数据被接受为真实的,并且打印单元将打印与图像数据相对应的图像。